#include <stdio.h>

int main(){
	FILE* fin=fopen("cifra.in","r");
	FILE* fout=fopen("cifra.out","w");
	
	int vec[21]={0,1,5,2,8,3,9,2,4,3,3,4,0,3,9,4,0,7,1,0,0};
	int t,len;
	char str[200];

	fscanf(fin,"%u\n",&t);

	for(int i=0;i<t;i++){
		fscanf(fin,"%s",str);
		len=0;
		while(str[++len]!='\0');
		if(len==1){
			fprintf(fout,"%u\n",vec[str[0]-'0']);
		}else{
			fprintf(fout,"%u\n",vec[((str[len-2]-'0')*10+(str[len-1]-'0'))%20]);
		}
	}
	fclose(fin);
	fclose(fout);
}