1 #include <bits/stdc++.h>
  2 using namespace std;
  3 int N, bx, by;
  4 int board[11][10];
  5 int tboard[11][10];
  6 int movable[11][10];
  7 struct CHESS
  8 {
  9     char name;
 10     int x, y;
 11 }chess[10];
 12 void Chariot(int x, int y){
 13     for(int i = x - 1; i >= 1; i--){
 14         movable[i][y] = 0;
 15         if(tboard[i][y] && tboard[i][y] != ‘B‘)
 16             break;
 17     }
 18     for(int i = x + 1; i <= 10; i++){
 19         movable[i][y] = 0;
 20         if(tboard[i][y] && tboard[i][y] != ‘B‘)
 21             break;
 22     }
 23     for(int i = y + 1; i <= 9; i++){
 24         movable[x][i] = 0;
 25         if(tboard[x][i] && tboard[x][i] != ‘B‘)
 26             break;
 27     }
 28     for(int i = y - 1; i >= 1; i --){
 29         movable[x][i] = 0;
 30         if(tboard[x][i] && tboard[x][i] != ‘B‘)
 31             break;
 32     }
 33 }
 34 void Cannon(int x, int y)
 35 {
 36     for(int i = x - 1; i >= 1; i --){
 37         if(tboard[i][y] && tboard[i][y] != ‘B‘){
 38             for(int j = i - 1; j >= 1; j--){
 39                 movable[j][y] = 0;
 40                 if(tboard[j][y] && tboard[j][y] != ‘B‘)
 41                     break;
 42             }
 43             break;
 44         }
 45     }
 46     for(int i = x + 1; i <= 10 ; i++){
 47           if(tboard[i][y] && tboard[i][y] != ‘B‘){
 48             for(int j = i+1; j <= 10; j++){
 49                 movable[j][y] = 0;
 50                 if(tboard[j][y] && tboard[j][y] != ‘B‘)
 51                     break;
 52             }
 53             break;
 54         }
 55     }
 56     for(int i = y - 1; i >= 1; i--){
 57         if(tboard[x][i] && tboard[x][i] != ‘B‘){
 58             for(int j = i - 1; j >= 1; j--){
 59                 movable[x][j] = 0;
 60                 if(tboard[x][j] && tboard[j][y] != ‘B‘)
 61                     break;
 62             }
 63             break;
 64         }
 65     }
 66 
 67      for(int i = y + 1; i <= 9; i++){
 68         if(tboard[x][i] && tboard[x][i] != ‘B‘){
 69             for(int j = i + 1; j <= 9; j++){
 70                 movable[x][j] = 0;
 71                 if(tboard[x][j] && tboard[j][y] != ‘B‘)
 72                     break;
 73             }
 74             break;
 75         }
 76     }
 77 
 78 }
 79 int dir[4][2] = {{-1,0},{0,1},{1,0},{0,-1}};//上右下左
 80 int dir2[8][2] = {{-2,-1},{-2,1},{-1,2},{1,2},{2,1},{2,-1},{1,-2},{-1,-2}};
 81 void Horse(int x, int y)
 82 {
 83     for(int i = 0; i < 4; i++){
 84         int tx = x, ty = y;
 85         tx += dir[i][0];
 86         ty += dir[i][1];
 87         if(tx >= 1 && ty >= 1 && tx <= 10 && ty <= 9);
 88         else continue;
 89         if(tboard[tx][ty]) continue;
 90         tx = x; ty = y;
 91         tx += dir2[(i+1)*2 - 2][0];
 92         ty += dir2[(i+1)*2 - 2][1];
 93         if(tx >= 1 && ty >= 1 && tx <= 10 && ty <= 9)
 94             movable[tx][ty] = 0;
 95         tx = x; ty = y;
 96         tx += dir2[(i+1)*2 - 1][0];
 97         ty += dir2[(i+1)*2 - 1][1];
 98         if(tx >= 1 && ty >= 1 && tx <= 10 && ty <= 9)
 99             movable[tx][ty] = 0;
100     }
101 }
102 int main()
103 {
104     
105     while(scanf("%d %d %d", &N, &bx, &by) != EOF){
106         if(N == 0) break;
107         memset(board, 0, sizeof(board));
108         board[bx][by] = ‘B‘;
109         for(int i = 1; i <= 10; i++){
110             for(int j = 1; j<= 9; j++){
111                 movable[i][j] = 1;
112             }
113         }
114 
115         for(int i = 0; i < N; i++){
116             int x, y;
117             char name;
118             scanf(" %c", &name);
119             scanf("%d %d", &x, &y);
120             board[x][y] = name;
121         }
122         int ok = 0;
123         for(int i = 0; i < 4; i++)
124         {
125             int tx = bx, ty = by;
126             tx += dir[i][0];
127             ty += dir[i][1];
128             if(tx >= 1 && tx <= 3 && ty >= 4 && ty <= 6);
129             else continue;
130             for(int k = 1; k <= 10; k++){
131                 for(int j = 1; j <= 10; j++){
132                     tboard[k][j] = board[k][j];
133                 }
134             }
135             tboard[tx][ty] = ‘B‘;
136 
137             for(int k = 1; k <= 10; k++){
138                 for(int j = 1; j<= 9; j++){
139                     movable[k][j] = 1;
140                 }
141             }
142 
143             for(int k = 1; k <= 10; k++){
144                 for(int j = 1; j <= 9; j++){
145                     switch(tboard[k][j]){
146                         case ‘G‘:
147                             Chariot(k,j);
148                             break;
149                         case ‘R‘:
150                             Chariot(k,j);
151                             break;
152                         case ‘H‘:
153                             Horse(k,j);
154                             break;
155                         case ‘C‘:
156                             Cannon(k,j);
157                             break;
158                     }
159                 }
160             }
161 
162             if(movable[tx][ty])
163                 ok = 1;
164         }
165         printf("%s\n", ok ? "NO":"YES");
166 
167     }
168     return 0;
169 }