
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
In the diagram below, lines $p$ and $q$ are parallel, and line $r$ is a transversal. Find the measure of angle $y$. Assume the angle measure just above point B is $45^\circ$ and the angle measure just below point B on line $q$ where line $s$ intersects is $15^\circ$.
```
     p: ----------------------/-------------------------
                               / r
     q: ---------------------/--------------------------
                             /
     s: --------------------/---------------------------
                        B  
```

Present the answer in LaTex format: \boxed{Your answer}
user