#include<stdio.h>
int main()
{
    int a;
    scanf("%d",&a);
    if(a>=2 && a==9);
    {
    switch(a)
     {
     case 2:
        printf("[A,B,C]");
        break;
     case 3:
         printf("[D,E,F]");
        break;
     case 4:
        printf("[G,H,I]");
        break;
     case 5:
        printf("[J,K,L]");
        break;
     case 6:
        printf("[M,N,O]");
        break;
     case 7:
        printf("[P,Q,R,S]");
        break;
     case 8:
         printf("[T,U,V]");
        break;
     case 9:
        printf("[W,X,Y,Z]");
        break;
    }}
    else{
 printf("Invalid input");
 }
 return 0;
}