Compounds of ていい

• ていい
  (exp,adj-i) (1) (after the ren'youkei form of a verb) indicates concession or compromise
  (2) indicates permission
• 何だっていい
  (exp) (col) (it doesn't matter what) anything is OK
• どうだっていい
  (exp) inconsequential
  indifferent
  not worth worrying about
  whatever you do is OK
  trivial