双指针

#include <bits/stdc++.h>
using namespace std;
int x,y;
char f(char c){
    if(c>='a'&&c<='z')return char(c-32);
    return c;
}
int main(){
    string a,b;
    getline(cin,a);
    getline(cin,b);
    while(x<a.size()&&y<b.size()){
        if(a[x]==' ')x++;
        else if(b[y]==' ')y++;
        else if(f(a[x])!=f(b[y])){
            cout << "NO";
            return 0;
        }else x++,y++;
    }cout << "YES";
    return 0;
}