#!/usr/bin/env python3

# Converts
# - Prefix: First line
# - Prefix: Second line
# - Other: Third line
# - Other: Fourth line
#
# To
# - Prefix:
#     - First line
#     - Second line
# - Other:
#     - Third line
#     - Fourth line

import sys

prefix = ''
for line in sys.stdin:
    ps = line.strip().split(' ')
    pf = ps.pop(0)
    if pf == '-':
        pf = ps.pop(0)
    if pf != prefix:
        prefix = pf
        print("- " + prefix)
    print("\t- " + ' '.join(ps))
