"""
Solution Author: Andrew Rayskiy
Date: 29.04.2018
"""

def go(l, r, log, turn):
    if l >= r: return 0
    if turn == 0:
        if l - (1 << (log + 1)) + 1 >= 1 and not go(l, r, log, 1): return 1
        if l + (1 << log) <= w and not go(l + (1 << log), r, log, 1): return 1
        return 0
    else:
        if r + (1 << (log + 1)) - 1 <= w and not go(l, r, log + 1, 0): return 1
        if r - (1 << log) >= 1 and not go(l, r - (1 << log), log + 1, 0): return 1
        return 0    

w = int(input())
x, y = map(int, input().split())

print(['cdkrot', 'letoucan'][go(x, y, 0, 0)])