A = gets.split.map(&:to_i)
def f(x)
  (x[0] != x[1] and x[1] != x[2] and x[2] != x[0]) and (x.max == x[1] or x.min == x[1])
end
ans = if f(A)
        "INF"
      else
        (1..A.max).count {|p| f(A.map {|a| a % p})}
      end
puts ans