#!/usr/bin/env python

import sys
import re

paragraph = ""
paragraphs = []

#blank lines are paragraph separators (assuming input is UNIX style ascii)
for line in sys.stdin:
        
    if line == '\n' and lastline != '\n':
        paragraphs.append(re.sub('[^a-zA-Z0-9]+', '', paragraph))
        paragraph = ""
    elif line != '\n':
        paragraph = paragraph+line

    lastline = line

#snag whatever is left
if len(paragraph) > 0:
    paragraphs.append(re.sub('[^a-zA-Z0-9]+', '', paragraph))


try:

    lasttop = []
    for paragraph in paragraphs:

        charmap = {}
        for char in paragraph:
            if char in charmap:
                charmap[char] += 1
            else:
                charmap[char] = 1

        charmaplen = len(charmap)
        if charmaplen > 10:
            chartlen = 10
        else:
            chartlen = charmaplen

        top = []
        while len(top) < chartlen:
            if len(charmap) > 0:
                maxchar = max(charmap, key=charmap.get)
                del charmap[maxchar]
                if maxchar not in lasttop:
                    top.append(maxchar)
            else:
                break

        print "\nparagraph: "+repr(paragraph)
        print "chars: "+repr(top)

        lasttop = top[:5]

except Exception, e:
    print "Aiieee!!!: "+e.message