For how many positive integers $x$ is $x^2 + 4x + 4$ between 10 and 50?
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
For how many positive integers $x$ is $x^2 + 4x + 4$ between 10 and 50?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
4
For how many positive integers $x$ is $x^2 + 4x + 4$ between 10 and 50?
train