# include<iostream> # include<cstdio> # include<cstring> using namespace std; int main(){ char a[10001],b[10001]; int a1=0,b1=0; cin>>a>>b; int len1=strlen(a); int len2=strlen(b); for(int i=0;i<len1;i++){ if(a[i]>='0'&&a[i]<='9') a1++; } for(int i=0;i<len2;i++){ if(b[i]>='0'&&b[i]<='9') b1++; } if(a1>b1){ for(int i=len2-1;i>=0;i--){ cout<<b[i]; } cout<<a[a1-1]; } else if(a1<b1){ for(int i=len1-1;i>=0;i--){ cout<<a[i]; } cout<<b[b1-1]; } return 0; }