Find the number of two-digit positive integers whose digits sum to 7.
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Find the number of two-digit positive integers whose digits sum to 7.
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
7
Find the number of two-digit positive integers whose digits sum to 7.
train