#include <bits/stdc++.h>   using namespace std;   int main() {     int i, j, r, n, x;     cin >> x;     r = x % 4;     if (r == 0) {       cout <<  1             <<   A ;     }     if (r == 1) {       cout <<  0             <<   A ;     }     if (r == 2) {       cout <<  1             <<   B ;     }     if (r == 3) {       cout <<  2             <<   A ;     }     return 0;   }   