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

void main()
{
    int[] A, B, C;
    foreach (line; stdin.byLineCopy.array)
    {
        auto input = line.split(".").to!(int[]);
        A ~= input[0];
        B ~= input[1];
        C ~= input[2];
    }

    (   A[0] * 10000 + B[0] * 100 + C[0]
     >= A[1] * 10000 + B[1] * 100 + C[1]
     ? "YES" : "NO").writeln;
}