import std.stdio, std.string, std.conv, std.algorithm, std.numeric;
import std.range, std.array, std.math, std.typecons, std.container, core.bitop;

void main() {
    ["NO", "YES"][iota(2).map!(i => readln.chomp.to!(dchar[]).sort()).array.uniq.count == 1].writeln;
}