URI 1467 - Zero or One

#include <stdio.h>

int main()
{
    int A, B, C;
    while (scanf("%d %d %d", &A, &B, &C))
    {
        if(A == B && B == C)
        {
            printf("*\n");
        }

        else if(B == C)
        {
            printf("A\n");
        }

        else if(A == C)
        {
            printf("B\n");
        }

        else
        {
            printf("C\n");
        }
    }
    return 0;
}