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

/// main =============
void main(){
  auto v1 = readln.strip.split(".").map!(to!int).array;
  auto v2 = readln.strip.split(".").map!(to!int).array;
  auto cond = zip(v1, v2).map!(e => e[0] >= e[1]).sum == 3;
  writeln( cond ? "YES" : "NO" ); 
}