10.2

# #!/usr/bin/python
#
# By dvdjaco
# Exercise 10.2
#

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
    time = words[5]
    hour = time.split(':')[0]
    d[hour] = d.get(hour,0) + 1

lst = list()
for hour, count in d.items(): lst.append( (hour, count) )
lst.sort()
for hour,count in lst: print hour, count