function issue(input: string) {

	const text: string[] = input.split('\r\n');

	const a: number = ( text[0].match( new RegExp( text[1], "g" ) ) || [] ).length ;

	if (a >= 0) {
		console.log(a);
	} else {
		console.log(-1);
	}
}

issue(require('fs').readFileSync('/dev/stdin', 'utf8'));