B - Tuadda Even Even, Sadda Even Dead Even

Deepak is a very lazy student he haven't submitted any of his assignments, but his teacher is kind and gave him a last chance. This time Deepak's teacher gave him $N$ positive integers and want Deepak to write down the smallest possible $Dead Even$ number which can be generated from the digits of given integer $X$. if it is not possible to generate the even number print -1. Dead even is defin