#!/usr/bin/env python3
lines = (x.strip() for x in open("input.txt"))
points = set()

for line in lines:
    if line.startswith("fold along x="):
        fold = int(line[13:])
        points = set((fold - abs(x-fold), y) for x, y in points if fold != x)
        break
    elif line.startswith("fold along y="):
        fold = int(line[13:])
        points = set((x, fold - abs(y-fold)) for x, y in points if fold != y)
        break
    elif len(line) > 0:
        points.add(tuple(int(num) for num in line.split(",")))

print(len(points))