Association for Couples Match(ACM)is a non-profit organization which is engaged in helping single people to find his/her other half.As November 11th is "Singles Day",on this day,ACM invites a large group of singles to the party.People round together,chatting with others,and matching partners.

    There are N gentlemen and M ladies in the party,each gentleman should only match with a lady vice versa.To memorize the Singles Day,ACM decides to divide people into 11 groups,each group should have the same amount of couples and no people are left without the groups.

    Can ACM achieve the goal?

NYOJ