def inst_typedef(instruction):
if instruction[0] == '*':
return None
elif instruction[0] == 's':
return Ins.InitialInstruction(instruction[0], instruction[4])
elif instruction[2] == ' ':
return Ins.WriteInstruction(instruction[0], instruction[4], instruction[6:-1])
else:
return Ins.ReadInstruction(instruction[0], instruction[4], instruction[2])
