#include <stdio.h>
 
int pallindrome(int loop)
{
	if (loop >= 10)
	{
		int temp, temp1 = 0, sum = 0;
		for(temp = 0; temp < 2;temp++)
		{
			temp1 = loop % 10;
			loop = loop / 10;
			sum = sum * 10 + temp1;
		}
		return(sum);
	}
	else
	{
		return(loop * 10);
	}
}
int main(void) {
	// your code goes here
	int a=0;
	int loop=0;
	for (loop=0; loop<=59; loop++)
	{
	    a = pallindrome(loop);
	    if (a < 60)
		printf("%.2d:%.2d\n", loop,a);	
	}
	return 0;
}

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