1	#!/usr/bin/env python
     2	
     3	import sys
     4	import re
     5	
     6	paragraph = ""
     7	paragraphs = []
     8	
     9	#blank lines are paragraph separators (assuming input is UNIX style ascii)
    10	for line in sys.stdin:
    11	        
    12	    if line == '\n' and lastline != '\n':
    13	        paragraphs.append(re.sub('[^a-zA-Z0-9]+', '', paragraph))
    14	        paragraph = ""
    15	    elif line != '\n':
    16	        paragraph = paragraph+line
    17	
    18	    lastline = line
    19	
    20	#snag whatever is left
    21	if len(paragraph) > 0:
    22	    paragraphs.append(re.sub('[^a-zA-Z0-9]+', '', paragraph))
    23	
    24	
    25	try:
    26	
    27	    lasttop = []
    28	    for paragraph in paragraphs:
    29	
    30	        charmap = {}
    31	        for char in paragraph:
    32	            if char in charmap:
    33	                charmap[char] += 1
    34	            else:
    35	                charmap[char] = 1
    36	
    37	        charmaplen = len(charmap)
    38	        if charmaplen > 10:
    39	            chartlen = 10
    40	        else:
    41	            chartlen = charmaplen
    42	
    43	        top = []
    44	        while len(top) < chartlen:
    45	            if len(charmap) > 0:
    46	                maxchar = max(charmap, key=charmap.get)
    47	                del charmap[maxchar]
    48	                if maxchar not in lasttop:
    49	                    top.append(maxchar)
    50	            else:
    51	                break
    52	
    53	        print "\nparagraph: "+repr(paragraph)
    54	        print "chars: "+repr(top)
    55	
    56	        lasttop = top[:5]
    57	
    58	except Exception, e:
    59	    print "Aiieee!!!: "+e.message
    60	        
    61	
    62