package main

import . "fmt"
import . "os"
import bf "bufio"
import . "strings"

func main() {
	rd:=bf.NewReader(Stdin)
	var n,m int
	Fscan(rd,&n,&m)
	c := 0
	for ;n>0;n-- {
		var s string
		var r int
		Fscan(rd,&s,&r)
		if r >= 1200 && Contains(s[:4], "x") {
			c++
		}
	}
	Println(c)
}