import std.stdio, std.conv, std.string, std.range, std.array, std.algorithm, std.math;

int main(){
	auto a = readln.strip.hage;
	auto b = readln.strip.hage;
	
	(a==b ? "YES" : "NO" ).writeln;
	
	return 0;
}

int[29] hage(string s){
	int[29] a;
	foreach(char c; s){
		a["abcdefghijklmnopqrstuvwxyz".indexOf(c)]++;
	}
	return a;
}