package main

import "fmt"

func max(a, b int) int {
	if a > b {
		return a
	}
	return b
}

func main() {
	var C1, C2 string
	fmt.Scan(&C1, &C2)
	C := C1 + C2
	maxh := 0
	// fmt.Println("C", C)
	for i := 0; i < len(C); i++ {
		if C[i] == 'o' {
			h := 1
			for j := i + 1; j < len(C); j++ {
				if C[j] == 'o' {
					h++
				} else {
					break
				}
			}
			maxh = max(maxh, h)
		}
	}
	fmt.Println(maxh)
}