/*
Print a stem-and-leaf plot of scores
from 0..100.
*/
#include <stdio.h>

void printstem(int counts[][10], int nrows, int nscores, int mean) {
	int score = 109;

	nscores /= 2;
	while (--nrows >= 0) {
		int j;
		printf("%2d ", nrows);
		for (j = 9; j >= 0; j--) {
			int n = counts[nrows][j];
			while (n-- > 0) {
				printf("%d", j);
				if (--nscores == 0)
					printf(" ");
			}
			if (mean >= score && mean < score + 1)
				printf(".");
			score--;
		}
		printf("\n");
	}
}

int main(void) {
	int i, j, n, counts[11][10], score;
	float sum = 0;

	for (i = 0; i < 11; i++)
		for (j = 0; j < 10; j++)
			counts[i][j] = 0;
	for (n = 0; scanf("%d", &score) != EOF; n++) {
		counts[score/10][score%10]++;
		sum += score;
	}
	if (n > 0)
		printstem(counts, 11, n, sum/n + 0.5);
	return 0;
}