#include<stdio.h>
#include<stdlib.h>
int comp( const void * p, const void *q)
{
	return (*(int *)p - *(int *)q);
}

int main(void)
{
	int T,age,count=-1;
	scanf("%d",&T);
	while(T--)
	{
		scanf("%d",&age);
		if(age-7<8)
			printf("%d\n",count);
		else
			printf("%d\n",age-7);
		count=-1;
	}
	return 0;
}