#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[1001],b[1001]; int sum1=0,sum2=0; cin>>a>>b; while(a[sum1]!='\0') sum1++; while(a[sum2]!='\0') sum2++; if(sum1==sum2) cout<<"yes"<<endl; else cout<<"no"<<endl; return 0; }