f = open("file");
s = f.read();
f.close();
menfou = 0;
for pair in s.splitlines():
    elfs = pair.split(",");
    values = elfs[0].split("-")
    start1 = int(values[0]);
    end1 = int(values[1]);
    values = elfs[1].split("-")
    start2 = int(values[0]);
    end2 = int(values[1]);
    if (start2 <= start1 <= end2 and end1 <= end2):
        print (start2, start1, end1, end2)
        menfou += 1;
    elif (start1 <= start2 <= end1 and end2 <= end1):
        print (start1, start2, end2, end1)
        menfou += 1;
print(menfou);