#include <stdio.h>
#include <string.h>

int main()
{

	char a[100];
	int i = 0;
	char copy[100];
	int len1 = 0;
	int isnumber = 0;
	int iscapital = 0;
	int isletter = 0;
	int inr = 0; // stands for is not reapiting
	int j = 0;
	printf("Enter your number\n");
	gets(a);
	strcpy(copy , a);
	len1 = strlen(copy);
	if(len1>=6&&len1<=8)
	{
		for(i = 0; i<=copy; i++)
		{
			if(copy[i]>=48 && copy[i]<=57)
			{
				isnumber = 1;
			}
			if(copy[i]>=1 && copy[i]<=26)
			{
				iscapital = 1;
			}
			if(copy[i]>=97 && copy[i]<=122)
			{
				isletter = 1;

			}

		}


	}

	else
	{
		printf("your password is invalid\n");
	}


	for(j = 0; j<=len1-2; j++)
	{
		if(copy[j]==copy[j+1])
		{
			inr = 1;
		}

	}

	if(isletter==1 && isnumber==1 && iscapital==1 && inr==1)
		{
			printf("your password is great\n");
		}
		else
		{
			printf("your password is invalid");
		}

	return(0);
}