Did you ever hear about 'Dragon Food' ? Its used to refer to the chocolates bought for your loved ones :). Po offers dragon food to master Shifu, who is a famous cook in the valley of food. In return, Shifu hands over the dragon scroll to Po, which is said to hold the ingredients of the secret recipe. To open the dragon scroll, one has to solve the following puzzle.

Did you ever hear about 'crossing the bridge noodle' ? Let me tell you that it's not some kind of bridge made of noodles. It's a dish, a kind of rice noodle soup. Mr.Ping makes the best noodle soup and his son Po is eagerly waiting for the user reviews in his father's blog. Users can vote with a (+) or a (-) and accordingly +1 or -1 is added to the total score respectively. Note that if a user votes multiple times, only his/her latest vote is counted towards the total score.

After a long period of relaxation Alice and Bob decided to play a game. This time of course not a number game. The rules of the game are as follows:

Chef has just finished the construction of his new garden. He has sown the garden with patches of the most beautiful carpet grass he could find. He has filled it with patches of different color and now he wants to evaluate how elegant his garden is.

Chef's garden looks like a rectangular grid of cells with N rows and M columns. So there are N x M cells in total. In each cell Chef planted grass of some color.

Chef's brother likes to put words in Chef's mouth. Chef hates it about him of course. He has decided to become extremely careful about what he speaks. Fortunately, he knows how his brother transforms the words, that Chef uses. He has decided to use only those words which remain the same even after his brother's transformation!