# include<iostream> using namespace std; int main(){ char a[150],b[150],c=0,d=0; cin>>a>>b; for(int i=0;;i++){ if(a[i]=='\0') break; else c++; } for(int i=0;;i++){ if(b[i]=='\0') break; else d++; } if(c==d) cout<<"yes"; else cout<<"no"; return 0; }