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#!/usr/bin/env ruby
class Generator
def initialize(iv, factor)
@value = iv
@factor = factor
end
def next
n = (@value * @factor) % 2147483647
@value = n
return n
end
end
input = $stdin.readlines.map(&:chomp)
ga = Generator.new(input[0].split[4].to_i, 16807)
gb = Generator.new(input[1].split[4].to_i, 48271)
matches = 0
Mask = 2**16
40_000_000.times do
a = ga.next % Mask
b = gb.next % Mask
matches += 1 if a == b
end
p matches
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