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