#include<bits/stdc++.h> using namespace std; int main(){ int n; int b1=0; int b2=0; int c1; int c2; char a1[1005]={}; char a2[1005]={}; cin>>a1>>a2; for(int i=1;i<=strlen(a1);i++) { if(a1[i]>='0'&&a1[i]<='9') b1++; } for(int i=1;i<=strlen(a1);i++) { if(a2[i]>='0'&&a2[i]<='9') b2++; } c1=strlen(a1); c2=strlen(a2); if(b1>b2) { n=b1; for(int i=c2-1;i>=0;i--) { cout<<a2[i]; } cout<<a1[n]; } if(b2>b1) { n=b2; for(int i=c1-1;i>=0;i--) { cout<<a1[i]; } cout<<a2[n]; } return 0; }