#!/usr/bin/env python3

lines = (x.strip() for x in open("input.txt"))
s = 0

for line in lines:
    a, b, x, y = map(int, line.replace(',', '-').split('-'))
    s += 1 if x <= a <= y or x <= b <= y or a <= x <= b or a <= y <= b else 0

print(s)