Bio _st12________________$$_________________________
____________________$$$________________________
____________________$$$$_______________________
_______________________________________________
_________$$$$$$$$___$$$$$$$$$$$________________
________$$$$$$$$$___$$$$$$$$$$$________________
________$$$$$__$$___$$$$$____________...__________
________$$$$$__$$___$$$$$______________________
________$$$$$_______$$$$$___$$__$$$$$$_________
________$$$$$_______$$$$$___$$__$___$$_________
________$$$$$_______$$$$$___$$_____$$__________
________$$$$$_______$$$$$___$$___$$____________
____$$__$$$$$________$$$$$$_$$__$$$$$$$________
____$$__$$$$$_________$$$$$$___________________
____$$