import std, core.bitop; string[] _R; void readM(T)(ref T x) { while (_R.empty) { _R = readln.chomp.split; } x = _R.front.to!T; _R.popFront; } bool chmin(T)(ref T A, T B) { return (A > B ? A = B, true : false); } bool chmax(T)(ref T A, T B) { return (A < B ? A = B, true : false); } int lowerBound(T)(T[] A, T x) { int lo = -1, hi = cast(int)(A.length); while (hi - lo > 1) { int mid = lo + hi >> 1; (A[mid] < x ? lo : hi) = mid; } return hi; } int upperBound(T)(T[] A, T x) { int lo = -1, hi = cast(int)(A.length); while (hi - lo > 1) { int mid = lo + hi >> 1; (A[mid] > x ? hi : lo) = mid; } return hi; } void main() { int N; N.readM; writeln(N < 1200 ? "green" : "difficult"); }