<|im_start|>system
You are a helpful assistant. You first think about the reasoning process in the mind and then provide the user with the answer. You should try to truely solve the question by yourself without cheating.  <|im_end|>
<|im_start|>user
 Sobha's father was 38 years old when she was born, while her mother was 36 years old when her brother, who is 4 years younger than Sobha, was born. Sobha also has a younger sister who is 3 years younger than her brother, and at the time of her birth, the age of their father was 45 years old. Meanwhile, their mother was 34 years old when the youngest sibling, who is 6 years younger than the sister, was born. What is the combined difference of the ages of the parents at the birth of each child? Show your work in <think> </think> tags. And return the final answer in <answer> </answer> tags.<|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>
user
35
Sobha's father was 38 years old when she was born, while her mother was 36 years old when her brother, who is 4 years younger than Sobha, was born. Sobha also has a younger sister who is 3 years younger than her brother, and at the time of her birth, the age of their father was 45 years old. Meanwhile, their mother was 34 years old when the youngest sibling, who is 6 years younger than the sister, was born. What is the combined difference of the ages of the parents at the birth of each child?
test