#include<iostream> #include<cstdio> #include<cstring> using namespace std; int main(){ string a; string b; int sum,sum1; sum = sum1 = 0; cin>>a>>b; for(int i = 0;i<a.size();i++){ if(a[i]>='0' && a[i]<='9'){ sum++; } } for(int i = 0;i<b.size();i++){ if(b[i]>='0' && b[i]<='9'){ sum1++; } } if(sum>sum1){ for(int i = b.size()-1;i>=0;i--){ cout<<b[i]; } cout<<a[sum-1]; } else{ for(int i = a.size()-1;i>=0;i--){ cout<<a[i]; } cout<<b[sum1-1]; } }