⢀⡤⣄⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⢠⡏⠀⠀⠳⡄⠀⠀⠀⠀⠀ ⣀⣀⣀⠀⠀⠀
⢸⠃⠀⠀⠀⢿⠀⠀⠀⠀ ⣼⠃⠀⠘⢧⠀⠀
⢸⡆⠀⠀⠀⠸⡆⠀⠀ ⣸⠃⠀⠀⠀⠈⢧⠀
⠈⣇⠀⠀⠀ ⣧⠀ ⠀⡏⠀⢦⠀⠀⠀⠸⡆
⠀⢹⡀⠀⠀⠀⢸⠀ ⢸⠇⠀⠘⢧⡀⠀⣸⠃
⠀⠀⢳⠀⠀⠀⢸⡆ ⢸⠀⠀⠀⣼⠙⠋⠁⠀
0
81
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