#include<stdio.h>
#include<math.h>
int main()
{
	int n;
	scanf("%d",&n);
	int i;
	int a,b,c,d;
	a=b=c=d=0;
	char op;
	op=getchar();
	for(i=1;i<=n;i++){
		scanf("%c",&op);
		if(op>='a'&&op<='z'||op>='A'&&op<='Z'){
			a++;
		}
		else if(op==' '||op=='\n'){
			b++;
		}
		else if(op>='0'&&op<='9'){
			c++;
		}
		else{
			d++;
		}
	}
	printf("letter = %d, blank = %d, digit = %d, other = %d",a,b,c,d);
	return 0;
}