#pragma comment(linker, "/STACK:1024000000,1024000000")#include <cstdio>#include <string>#include <cstdlib>#include <cmath>#include <iostream>#include <cstring>#include <set>#include <queue>#include <algorithm>#include <vector>#include <map>#include <cctype>#include <cmath>#include <stack>#include <tr1/unordered_map>#define freopenr freopen("in.txt", "r", stdin)#define freopenw freopen("out.txt", "w", stdout)using namespace std;using namespace std :: tr1;typedef long long LL;typedef pair<int, int> P;const int INF = 0x3f3f3f3f;const double inf = 0x3f3f3f3f3f3f;const LL LNF = 0x3f3f3f3f3f3f;const double PI = acos(-1.0);const double eps = 1e-8;const int maxn = 26 + 5;const int mod = 1e9 + 7;const int N = 1e6 + 5;const int dr[] = {-1, 0, 1, 0, 1, 1, -1, -1};const int dc[] = {0, 1, 0, -1, 1, -1, 1, -1};const char *Hex[] = {"0000", "0001", "0010", "0011", "0100", "0101", "0110", "0111", "1000", "1001", "1010", "1011", "1100", "1101", "1110", "1111"};inline LL gcd(LL a, LL b){  return b == 0 ? a : gcd(b, a%b); }int n, m;const int mon[] = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};const int monn[] = {0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};inline int Min(int a, int b){ return a < b ? a : b; }inline int Max(int a, int b){ return a > b ? a : b; }inline LL Min(LL a, LL b){ return a < b ? a : b; }inline LL Max(LL a, LL b){ return a > b ? a : b; }inline bool is_in(int r, int c){    return r >= 0 && r < n && c >= 0 && c < m;}char s[15][15];int ans;void dfs(int r, int c, int cnt){    ans = Max(ans, cnt);    for(int i = 4; i < 8; ++i){        int x = r + dr[i];        int y = c + dc[i];        int xx = x + dr[i];        int yy = y + dc[i];        if(is_in(xx, yy) && s[x][y] == ‘B‘ && s[xx][yy] == ‘#‘){            s[x][y] = ‘#‘;            dfs(xx, yy, cnt+1);            s[x][y] = ‘B‘;        }    }}int main(){    int T;  cin >> T;    n = m = 10;    while(T--){        for(int i = 0; i < 10; ++i)  scanf("%s", s+i);        ans = 0;        for(int i = 0; i < 10; ++i)            for(int j = 0; j < 10; ++j)                if(s[i][j] == ‘W‘){ s[i][j] = ‘#‘;  dfs(i, j, 0); s[i][j] = ‘W‘; }        printf("%d\n", ans);    }    return 0;}