#include<iostream> #include<cstring> using namespace std; int main(){ char s1[1001]; char s2[1001]; int a1=0,a2=0; cin>>s1>>s2; while(s1[a1]!='\0') a1++; while(s2[a2]!='\0') a2++; if(a1==a2){ for(int i=0; i<a1; i++) { if(s1[i]!=s2[i]) { cout<<"no"<<endl; break; } else cout<<"yes"<<endl; } } return 0; }