# include<iostream> using namespace std; int main(){ int len1,len2; char s1[151],s2[151]; cin>>s1>>s2; while(s1[len1]!='\0'){ len1++; } while(s2[len2]!='\0'){ len2++; } if(len1==len2){ cout<<'yes'; } else { cout<<'no'; } return 0; }