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

void readV(T...)(ref T t){auto r=readln.splitter;foreach(ref v;t){v=r.front.to!(typeof(v));r.popFront;}}
T[] readArray(T)(size_t n){auto a=new T[](n),r=readln.splitter;foreach(ref v;a){v=r.front.to!T;r.popFront;}return a;}
T[] readArrayM(T)(size_t n){auto a=new T[](n);foreach(ref v;a)v=readln.chomp.to!T;return a;}

void main()
{
  auto s = readArrayM!string(3);
  auto h = new int[](2);
  foreach (si; s) ++h[si.predSwitch("RED", 0, "BLUE", 1)];
  writeln(h[0] > h[1] ? "RED" : "BLUE");
}