#!/usr/bin/env python

# Sorts a spreadsheet based on a column

import csv

import sys

def by_idx(list_, idxes): return [list_[i] for i in idxes]

def cmp_nulls_last(*row_pair):

    def repl(val):

        if val == '': val = () # sorts > ''

        return val

    return cmp(*map(lambda row: map(repl, row), row_pair))

def main():

    col_nums = sys.argv[1:]

    if col_nums == []:

        raise SystemExit('Usage: '+sys.argv[0]+' col_num... <map >sorted_map')

    col_nums = map(int, col_nums) # 0-based

    # Sort map

    reader = csv.reader(sys.stdin)

    cols = reader.next()

    def get_sort_by(row): return by_idx(row, col_nums)

    rows = list(reader)

    rows.sort(lambda *row_pair: cmp_nulls_last(*map(get_sort_by, row_pair)))

    writer = csv.writer(sys.stdout)

    writer.writerow(cols)

    map(writer.writerow, rows)

main()