Write a program that, given a sequence of words, computes how many characters have in total the words that appear once, how many characters have in total the words that appear twice, how many characters have in total the words that appear thrice, etc.
Input consists of several cases. Each case begins with a number , followed by words.
For each case of the input and for each number of repetitions, print in a line the total number of characters (not counting repetitions) of the words that appear exactly times, If there is no word with repetitions, do not print anything for this . Print an empty line after every case.
Input
12 z z ab dddddd z z ab yy yy yy yy x 2 c3po r2d2
Output
1 : 7 2 : 2 4 : 3 1 : 8