The target is find a exposed dungeon in this seed and two chests inside it. From the spawn cross the river, then turn right until you come to a valley of a savannah biome. After walking 30 block turn left and you will see the mountain of the valley. In there you will see the entrance of exposed dungeon, go inside you will meet some zombie and two chests. Enjoy the results you got.
Seeds : 12808 Work in PE ver0.12.1 and ver0.11.0+
Found by: Flash_SP