package main

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

type Matrix map[int64]int
func (m Matrix) Increment(x, y int) {
	z := int64(x) << 32 | int64(y)
	m[z]++
}
func (m Matrix) DrawLine(x1, y1, x2, y2 int) {
	x := x1
	y := y1

	for x != x2 || y != y2 {
		m.Increment(x, y)

		if x1 > x2 {
			x--
		} else if x1 < x2 {
			x++
		}

		if y1 > y2 {
			y--
		} else if y1 < y2 {
			y++
		}
	}

	m.Increment(x, y)
}

func main() {
	m := Matrix{}

	s := bufio.NewScanner(os.Stdin)
	for s.Scan() {
		var x1, x2, y1, y2 int
		_, _ = fmt.Sscanf(s.Text(), "%d,%d -> %d,%d", &x1, &y1, &x2, &y2)
		// consider only horizontal or vertical lines
		if x1 == x2 || y1 == y2 {
			m.DrawLine(x1, y1, x2, y2)
		}
	}

	sum := 0
	for _, count := range m {
		if count > 1 {
			sum++
		}
	}
	fmt.Println(sum)
}