10.1

# #!/usr/bin/python
#
# By dvdjaco
# Exercise 10.1
#

fname = raw_input('Enter a filename: ')

try:
    f = open(fname)
except err:
    print "There was an error: ", err

d = dict()

for line in f:
    words = line.split()
    if len(words) == 0 or words[0] != 'From' or words[1].find('@') == -1: continue
    address = words[1]
    d[address] = d.get(words[1],0) + 1

lst = list()
for address, count in d.items(): lst.append( (count,address) )
lst.sort(reverse=True)
count, address = lst[0]
print address, count