const reader = require("readline").createInterface({
  input: process.stdin,
  output: process.stdout
});
let lines = [];
reader.on("line", line => {
  lines.push(line);
});
reader.on("close", () => {
const sum = lines.map(line => line.trim().length).reduce( (accumulator, currentValue) => {
   return accumulator + currentValue
}) 
if (sum > 10 ) {
	console.log('BLUE')
} else {
console.log('RED')
}
});