// Input.
let input = [
  'f',
  '3'
];

// Custom implementation of read and print. Do not touch : )
let print = this.print || console.log;
let gets = this.gets || ((arr, index) => () => arr[index++])(input, 0);

// Solution
let label = gets();
let rank = gets();

if (label === "a" || label === "c" || label === "e" || label === "g") {
  if (rank === "1" || rank === "3" || rank === "5" || rank === "7")
  console.log("dark");
}
else if (label === "a" || label === "c" || label === "e" || label === "g") {
  if (rank === "2" || rank === "4" || rank === "6" || rank === "8")
  console.log("light");
}
else if (label === "b" || label === "d" || label === "f" || label === "h") {
  if (rank === "1" || rank === "3" || rank === "5" || rank === "7")
  console.log("light");
}
else if (label === "b" || label === "d" || label === "f" || label === "h") {
  if (rank === "2" || rank === "4" || rank === "6" || rank === "8")
  console.log("dark");
}