#include<bits/stdc++.h>
using lint=long long;
using real=long double;
int main(){
    std::cin.tie(nullptr);std::ios_base::sync_with_stdio(false);
    std::cout.setf(std::ios_base::fixed);std::cout.precision(15);
    std::string s,t;std::cin>>s>>t;
    lint a=std::accumulate(s.begin(),s.end(),0ll,[](lint cum,char c){return cum+c-'0';})%3;
    lint b=(s.back()-'0')%2;
    lint n=0;
    for(;n<6;n++){
        if(n%3==a&&n%2==b)break;
    }
    assert(0<=n&&n<6);
    if((t.back()-'0')%2==0){
        if(n==2)n=4;
        if(n==5)n=1;
    }
    std::cout<<"428571"[n]<<'\n';
}
/*
 * 0
 * 1
 * 2 4
 * 3
 * 4
 * 5 1
 */