--- Part Two --- It seems like the individual flashes aren't bright enough to navigate. However, you might have a better option: the flashes seem to be synchronizing! In the example above, the first time all octopuses flash simultaneously is step 195: After step 193: 5877777777 8877777777 7777777777 7777777777 7777777777 7777777777 7777777777 7777777777 7777777777 7777777777 After step 194: 6988888888 9988888888 8888888888 8888888888 8888888888 8888888888 8888888888 8888888888 8888888888 8888888888 After step 195: 0000000000 0000000000 0000000000 0000000000 0000000000 0000000000 0000000000 0000000000 0000000000 0000000000 If you can calculate the exact moments when the octopuses will all flash simultaneously, you should be able to navigate through the cavern. What is the first step during which all octopuses flash?