local function calculate_hash(crystal, item, count)
    local c = ((crystal % 6506) % 4238) % 4096
    local m = (c + 1) * 6 + 77
    local b = (c + 1) * 42 + 31
    local m2 = (8 * (c) + 26) + (item - 1) * (c + 35)
    return (m * item + b + m2 * (count - 1)) % 127
end