Dear investigator,The situation is worse than when we last spoke. Strange mysteries are popping all over the Eastern Capital and my team can't solve them fast enough!With your help, we will be able to solve more of these mysteries and then we can focus on figuring out who is behind all of this.I hope you won't take any offense at this, but I need to test you to find out how skilled you really are...In my office, you will find a traditional coin, broken into four pieces. Solve these puzzles, put the coin back together, and you will hear from me again.

Your friend,ペンギン探偵Tantei Pengin