#include <stdio.h>
#include <limits.h>
void main()
{
	int length, total, i, j, k, minIndex, temp;
	short int key[100] = { 0 };
	char str[100][50] = { '\0' };

	scanf("%d%d", &length, &total);

	if ( ! (length > 0 && length <= 50) && (total > 0 && total <= 100) )
		return ;
	for ( i = 0; i < total; i++)
		scanf("%s", str[i]);

	for ( i = 0; i < total; i++)
	{
		for ( j = 0; j < length; j++)
		{
			for ( k = j + 1; k < length; k++)
				if ( str[i][j] > str[i][k] )
					key[i]++;
		}
	}

	for ( i = 0; i < total; i++)
	{
		temp = INT_MAX;
		for ( j = 0; j < total; j++)
		{
			if ( key[j] < temp && key[j] >= 0)
			{
				minIndex = j;
				temp = key[j];
			}
		}
		printf("%s\n", str[minIndex]);
		key[minIndex] = -1;
	}
}

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