U-boats_commissioned_in_1916	["SM_UB-20", "SM_UB-21", "SM_UB-22", "SM_UB-23", "SM_UB-26", "SM_UB-29", "SM_UB-30", "SM_UB-31", "SM_UB-32", "SM_UB-34", "SM_UB-35", "SM_UB-37", "SM_UB-39", "SM_UC-44", "SM_UB-33", "SM_U-49", "SM_U-48", "SM_U-50", "SM_U-51", "SM_U-52", "SM_U-72", "SM_U-73", "SM_U-78", "SM_U-79", "German_submarine_Deutschland"]
