# include<iostream> using namespace std; int main(){ char s1[51],s2[51],a[51]; cin>>s1>>s2; int i=0; for(i=0;s1[i]!='\0';i++){ if(s1[i]=='1'&&s2[i]=='1'){ a[i]='1'; } if(s1[i]=='0'&&s2[i]=='1'){ a[i]='0'; } if(s1[i]=='0'&&s2[i]=='0'){ a[i]='1'; } if(s1[i]=='1'&&s2[i]=='0'){ a[i]='0'; } } a[i+1]='\0'; cout<<a; return 0; }