package main

import (
	"bufio"
	"fmt"
	"os"
)

func main() {
	var a, b string
	in := bufio.NewReader(os.Stdin)
	fmt.Fscan(in, &a, &b)

	p := 0
	for i := 0; i < len(b); i++ {
		if b[i] == '1' {
			p ^= 1
		}
	}

	q := 0
	for i := 0; i < len(b); i++ {
		if a[i] == '1' {
			q ^= 1
		}
	}

	ans := 0
	if p == q {
		ans++
	}

	for i := len(b); i < len(a); i++ {
		if a[i] == '1' {
			q ^= 1
		}
		if a[i-len(b)] == '1' {
			q ^= 1
		}
		if p == q {
			ans++
		}
	}

	fmt.Println(ans)
}