prompt: The difference between 87 and 66 is: 
random_counterfactual.prompt: The difference between 73 and 54 is: 
ones_op1_counterfactual.prompt: The difference between 87 and 66 is: 
ones_op2_counterfactual.prompt: The difference between 87 and 64 is: 
tens_op1_counterfactual.prompt: The difference between 77 and 66 is: 
tens_op2_counterfactual.prompt: The difference between 87 and 66 is: 
ones_carry_counterfactual.prompt: The difference between 90 and 69 is: 
tens_carry_counterfactual.prompt: The difference between 87 and 66 is: 