First : small, light green, round, and imprinted with 259 and WATSON. Second: yellowish, oblong, scored, imprinted with 1 8 on one side, and an odd-looking A on the other. Third: yellow/white capsule with KU 118. Fourth: round, light blue,and imprinted by Eon (sandoz) and a 72. Can you tell me what they are, and for what uses, please?