fname = raw_input("Enter file name: ")
if len(fname) < 1 : fname = "mbox"
fh = open(fname)
dic = dict()
for line in fh:
    line.rstrip()
    if not line.startswith('From '):
        continue
    else:
        words = line.split()
        time = words[5]
        q = ':'
        t = time.split(q)
        hours = t[:1]
        for cnt in hours:
            dic[cnt] = dic.get(cnt,0) + 1

lst = list()
for (k,v) in dic.items():
    lst.append( (k,v) )
print lst