On the 15 day of Christmas, my true love gave to me:
Hashiwokakero Holly
How to play Hashiwokakero
Santa needs you to build bridges between the round islands top-down and from left to right so that in the end all islands are connected. Bridges must never cross each other. On each bridge there must be at least one lane but no more than two lanes. The numbers on each island indicate with how many lanes this island should be connected to other islands in total. Draw one line for each lane on the bridges!