#include <iostream> #include <cstdio> using namespace std; int main() { char s[151],a[151]; cin>>s>>a; int s1=0,s2=0; while(s[s1]!='\0'){ s1++;} while(a[s2]!='\0'){ s2++; } if (s1==s2) cout<<"yes"; else cout<<"no"; return 0; }