def is_ok_1 c1, c2, c3
    if c1 == 0
        c1 = 1
    elsif c2 == 0
        c2 = 1
    else
        c3 = 1
    end
    if c1 == c2 or c2 == c3 or c3 == c1
        return false
    end
    if [c1, c2, c3].max == c2 or [c1, c2, c3].min == c2
        return true
    else
        return false
    end
end

def is_ok_4 c1, c2, c3
    if c1 == 0
        c1 = 4
    elsif c2 == 0
        c2 = 4
    else
        c3 = 4
    end
    if c1 == c2 or c2 == c3 or c3 == c1
        return false
    end
    if [c1, c2, c3].max == c2 or [c1, c2, c3].min == c2
        return true
    else
        return false
    end
end

c1, c2, c3 = gets.chomp.split.map &:to_i
if is_ok_1(c1, c2, c3)
    print 1
end
if is_ok_4(c1, c2, c3)
    print 4
end
puts