5 friends gathered some coconuts. Being tired they fell asleep. At night 1st friend got up, divided the pile into equal shares, took his share and the extra one coconut was given to the monkey. The piles were put together again. This was done exactly by all 5 friends. In the morning all of them woke up and divided the pile equally with one extra coconut to the monkey again. What is the minimum number of coconuts they gathered?