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#include <cstdio>

int s[4000], c[4000][26], p[4000];
char r[4000];

int main()
{
  int n, m, q;
  char a;
  scanf("%i%i ", &n, &m);
  for (int i = 0; i<n; i++)
  {
    for (int j = n; j<n+m; j++)
    {
      scanf("%c", &a);
      a -= 'A';
      c[i][(int)a]++;
      c[j][(int)a]++;
    }
    scanf(" ");
  }
  for (int i = 0; i<n+m; i++) for (int k = 0; k<26; k++) s[i] += c[i][k]>0;
  q = 0;
  while (1)
  {
    int i;
    for (i = 0; i<n+m; i++) if (s[i] == 1) break;
    if (i<n+m)
    {
      int k;
      for (k = 0; k<26; k++) if (c[i][k] > 0) break;
      p[q] = i;
      r[q++] = k;
      s[i]--;
      c[i][k]--;
      for (int j = n*(i<n); j < n+m*(i<n); j++) if (s[j]>0) s[j] -= !--c[j][k];
    }
    else break;
  }
  printf("%i\n", q);
  for (int i = q-1; i>=0; i--) printf("%c %i %c\n", "RK"[p[i]>=n], 1+p[i]-n*(p[i]>=n), 'A'+r[i]);
  return 0;
}