▌ ▗    ▜       ▗     
▛▌▜▘▛▛▌▐ █▌▌▌▀▌▜▘▛▌▛▘
▌▌▐▖▌▌▌▐▖▙▖▚▘█▌▐▖▙▌▌ 



     ___
 10 |   |
    |   |
 09 |   |
    |   |
 08 |   |
    |   |
 07 |   |
    |   |
 06 | * |
    |   |
 05 |   |
    |   |
 04 |   |
    |   |
 03 |   |
    |   |
 02 |   |
    |   |
 01 |   |
    |   |
 00 |   |
    |   |
 B1 |   |
    |   |
 B2 |   |
    |   |
 B3 |   |
    |   |
    |___|

there are many doors here.
all of them are closed and locked.