#!/usr/bin/python
#    Copyright (C) 2012 Jeff Epler
#    This program is free software; you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation; either version 2 of the License, or
#    (at your option) any later version.
#
#    This program is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU General Public License for more details.
#
#    You should have received a copy of the GNU General Public License
#    along with this program; if not, write to the Free Software
#    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
import sys
import re

p = {None: 0, 'k': 1, 'm': 2, 'g': 3, 't': 4, 'e': 5, 'z': 6, 'y': 7}
rpd = ['', 'k', 'M', 'G', 'T', 'E', 'Z', 'Y']
rp2 = ['', 'Ki', 'Mi', 'Gi', 'Ti', 'Ei', 'Zi', 'Yi']
exp = {None: 1000, 'i': 1024}
pat = re.compile("([-+]?[0-9.]+)(?:([kmgtezy])(i)?)?b?")

prefix_seen = False
def nonzero((v,p,e)): return bool(v)

def val(s):
    global prefix_seen
    m = pat.match(s.lower())
    if m.group(2): prefix_seen = True
    return float(m.group(1)), p[m.group(2)], exp[m.group(3)]

def sub(a, b):
    av, ap, ae = a
    bv, bp, be = b
    if ap > bp:
        v = av - bv * be ** (bp-ap)
        p = ap
        e = ae
    else:
        v = av * ae ** (ap-bp) - bv
        p = bp
        e = be
    while v and abs(v) > e:
        v /= e
        p += 1
    while v and abs(v) < (1./e):
        v *= e
        p -= 1
    return (v, p, e)

def show((v,p,e)):
    if not prefix_seen:
        return "%d" % int(v * e ** p)
    s = "%+.2f" % v
    s = s.rstrip("0").rstrip(".")
    if e == 1024:
        return "%s%s" % (s, rp2[p])
    else:
        return "%s%s" % (s, rpd[p])


def read_du(f):
    if f == "-": f = sys.stdin
    else: f = open(f)
    d = {}
    for line in f:
	v, k = line.strip().split(None, 1)
	d[k] = val(v)
    return d

d1 = read_du(sys.argv[1])
if len(sys.argv) > 2:
    d2 = read_du(sys.argv[2])
else:
    d2 = read_du('-')

while d1:
    k, v1 = d1.popitem()
    if k in d2:
	v2 = d2.pop(k)
    else:
	v2 = val("0")
    dv = sub(v2, v1)
    if nonzero(dv):
	print "%s\t%s" % (show(dv), k)
while d2:
    k, v2 = d2.popitem()
    if nonzero(v2):
        print "%s\t%s" % (show(v2), k)