stupid mistake

i am so stupid today.
i had open my neighbor door when i get home today.

i tried the key quite hard, already start to talk to myself 'what the hell so difficult to open today'...then have a look at the address, it's 806 instead of 804!!

this is the 2nd time i made the mistake, the 1st time is i went to wrong block, room number is correct 804, but it is not the block i stay!

this is the result of not being focus.. my mind is lost somewhere...