#include<stdio.h>
#include<string.h>
#include<stdlib.h>
int main(void){
int a,b,c;
scanf("%d %d %d",&a,&b,&c);
if(a>b&&a>c&&b>c){printf("A\nB\nC\n");}
else if(a>b&&a>c&&c>b){printf("A\nC\nB\n");}
else if(b>a&&b>c&&a>c){printf("B\nA\nC\n");}
else if(b>a&&b>c&&c>a){printf("B\nC\nA\n");}
else if(c>a&&c>b&&a>b){printf("C\nA\nB\n");}
else if(c>a&&c>b&&b>a){printf("C\nB\nA\n");}
}