import pprint
import re
import sys

data = sys.stdin.read()

exec (data.replace('(', 'dict(')) # use only for input that you control e.g., for unit-testing
pprint.pprint(abc)

def repl_flat(m):
    return "\n".join("<{0}>{1}</{0}>".format(*map(str.strip, s.partition('=')[::2]))
                     for s in m.group(1).split(','))

def eval_nested(expr):
    val, n = re.subn(r"\(([^)(]+)\)", repl_flat, expr)
    return val if n == 0 else eval_nested(val)

print eval_nested("(%s)" % (data,))