#!/usr/bin/env python

import re

crates = []

def process_crates(spec):
    for i in range(0, len(spec), 4):
        pos = i // 4
        if len(crates) < pos + 1:
            crates.append([])

        if spec[i] != '[':
            continue

        crates[pos].append(spec[i+1])

def process_instruction(spec):
    m = re.search('^move (\d+) from (\d+) to (\d+)$', spec)
    count = int(m.group(1))
    src = int(m.group(2)) - 1
    dst = int(m.group(3)) - 1

    items = []
    for i in range(0, count):
        items.append(crates[src].pop())
    items.reverse()
    crates[dst] = crates[dst] + items

with open('input') as f:
    # Read the diagram + separating line
    for line in f:
        if line[0] == ' ':
            continue
        if line == "\n":
            break
        process_crates(line.rstrip())

    # We filled the lines upside down, so flip them
    for pos in crates:
        pos.reverse()

    for line in f:
        process_instruction(line.rstrip())

out = ""
for pos in crates:
  out = out + pos[-1]

print(out)