char **trim(char *cmd)
{
  char **argv;
  char **rtr;
  argv = (char**)malloc(10*sizeof(char *));
  for(int i = 0; i < 10; i++)
    argv[i] = (char*)malloc(sizeof(char)*50);
  rtr = argv;
  int i = 0;
  while (*cmd != ‘\0‘ && *cmd != ‘\n‘) {
    if (*cmd != ‘ ‘) {
      *(*argv+i) = *cmd;
      ++cmd;
      i++;
    }
    else {
      i = 0;
      ++cmd;
      ++argv;
      while(*cmd == ‘ ‘) {
    ++cmd;
      }

    }
  }
  return rtr;
}