import sys
sk = {}
try:
    f = open('phonebook.txt', 'r')
except IOError:
    print 'No file!'
    sys.exit()

f = open('phonebook.txt', 'r')
for line in f:
    lista = line.strip().split(',')
    sk[lista[0]] = lista[1]
f.close

print 'Numbers'
for k,v in sk.iteritems():
    print k.strip(),v.strip()

loop=True
try:
    f = open('phonebook.txt', 'w')
except IOError:
    print 'No file!'
    sys.exit()

f = open('phonebook.txt', 'w')
while loop:
    name=raw_input('Give name: ')
    if name == '':
        for k,v in sk.iteritems():
            f.write(k)
            f.write(', ')
            f.write(v)
            f.write('\n')
            f.close
        loop = False
        sys.exit()
    number=raw_input('Give number: ')
    sk[name]=number
    print 'Numbers'
    for k,v in sk.iteritems():
        print k, v