#include<stdio.h>
int main()
{
    int a,b,c;
    
    a=1,b=2,c=3;
    if(input a,b){
        printf("c is correct");
    }
    else if(input b,c){
        printf("a is correct");
    }
    else if(input c,a){
        printf("b is correct");
    }
    
    return 0 ;