#include <bits/stdc++.h>   using namespace std;   int w[2][2];   int kb[2], kc[2];   int size[10][10];   string s;   int main() {     ios_base::sync_with_stdio(0);     for (int i = 0; i <= (int)(2) - 1; i++) {       cin >> s;       w[i][0] = s[0] -  a ;       w[i][1] = s[1] -  1 ;     }     cin >> s;     kb[0] = s[0] -  a ;     kb[1] = s[1] -  1 ;     cin >> s;     kc[0] = s[0] -  a ;     kc[1] = s[1] -  1 ;     for (int i = 0; i <= (int)(10) - 1; i++)       for (int j = 0; j <= (int)(10) - 1; j++) size[i][j] = 0;     int x, y;     for (int ii = 0; ii <= (int)(2) - 1; ii++) {       for (int i = w[ii][0] + 1; i <= 7; i++) {         if (i == kb[0] && w[ii][1] == kb[1]) break;         size[i][w[ii][1]] = 1;       }       for (int i = w[ii][0] - 1; i >= 0; i--) {         if (i == kb[0] && w[ii][1] == kb[1]) break;         size[i][w[ii][1]] = 1;       }       for (int j = w[ii][1] + 1; j <= 7; j++) {         if (w[ii][0] == kb[0] && j == kb[1]) break;         size[w[ii][0]][j] = 1;       }       for (int j = w[ii][1] - 1; j >= 0; j--) {         if (w[ii][0] == kb[0] && j == kb[1]) break;         size[w[ii][0]][j] = 1;       }     }     for (int i = -1; i <= 1; i++)       for (int j = -1; j <= 1; j++) {         int a = i + kb[0], b = j + kb[1];         if (a >= 0 && a < 8 && b >= 0 && b < 8) {           size[a][b] = 1;         }       }     for (int i = -1; i <= 1; i++)       for (int j = -1; j <= 1; j++) {         int a = i + kc[0], b = j + kc[1];         if (a >= 0 && a < 8 && b >= 0 && b < 8) {           if (size[a][b]) {           } else {             cout <<  OTHER n ;             return 0;           }         }       }     cout <<  CHECKMATE n ;     return 0;   }   