advent-of-code/12023/17/17.lua

io.input("test")

map = {}
for line in io.lines() do
    local row = {}
    string.gsub(line, "(%d)", function (c) table.insert(row,c) end)
    table.insert(map, row)
end

for i,row in ipairs(map) do
    print(i, table.concat(row, " "))
end