from lib import *

second = True

if second is False:
    keypad = "123\n456\n789".splitlines()
else:
    keypad = "00100\n02340\n56789\n0ABC0\n00D00".splitlines()

data = open(0).read()

DIRS = {
    "D": (1, 0),
    "L": (0, -1),
    "R": (0, 1),
    "U": (-1, 0),
}

BOUND = len(keypad) - 1
pos = (2, 0)
r = ""
for row in data.splitlines():
    for c in row:
        dir = DIRS[c]
        npos = pos[0] + dir[0], pos[1] + dir[1]
        if npos[0] >= 0 and npos[0] <= BOUND and npos[1] >= 0 and npos[1] <= BOUND:
            if keypad[npos[0]][npos[1]] != "0":
                pos = npos
    r += keypad[pos[0]][pos[1]]

print(r)