#include<iostream> // cin\cout\endl #include<cstdio> //scanf()\printf() #include<cstring> // strcpy()\strcat()\strcmp()\strlen()\memset() #include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min() using namespace std; int main(){ char a[151],s[151]; int n=0,m=0; cin>>a>>s; while(a[n]!='\0') n++; while(s[m]!='\0') m++; if(n==m) cout<<"yes"<<endl; else cout<<"no"<<endl; return 0; }