<|im_start|>user
Tell me if this a universal blood group:  A+, A-,  B+, B-,  O+, O-,  AB+, AB-<|im_end|>
<|im_start|>assistant
A+ = No
A- = No
B+ = No
B- = No
O+ = No
O-  = Yes
AB+= No
AB-= No<|im_end|>
