I wish this wasn't neccessary:
'key' is a command-alias to 'unlock door $* with key 1;unlock door $* with key
2;unlock door $* with key 3;unlock door $* with key 4;unlock door $* with key
5;unlock door $* with key 6;unlock door $* with key 7;unlock door $* with key
8;unlock door $* with key 9;unlock door $* with key 10'.