prompt: The difference between 91 and 48 is: 
random_counterfactual.prompt: The difference between 81 and 49 is: 
ones_op1_counterfactual.prompt: The difference between 99 and 48 is: 
ones_op2_counterfactual.prompt: The difference between 91 and 40 is: 
tens_op1_counterfactual.prompt: The difference between 61 and 48 is: 
tens_op2_counterfactual.prompt: The difference between 91 and 78 is: 
ones_carry_counterfactual.prompt: The difference between 99 and 46 is: 
tens_carry_counterfactual.prompt: The difference between 91 and 48 is: 