Sticker Album

Find the first draw that completes a page of needed stickers.

You are given sticker names drawn one at a time and a list of stickers needed for one album page. Read the draws from left to right. Keep track of which needed stickers have appeared. Extra stickers do not matter. Return the draw number when every needed sticker has appeared for the first time. Draw numbers start at 1. Return 0 when no stickers are needed. Return -1 when the page is not completed.