import sys

with open("senti/core/pipeline/router.py", "r", encoding="utf-8") as f:
    lines = f.readlines()

# Search for 'fee_answer'
for i, line in enumerate(lines):
    if "fee_answer" in line:
        print(f"=== Found at line {i+1} ===")
        start = max(0, i - 5)
        end = min(len(lines), i + 5)
        for j in range(start, end):
            try:
                sys.stdout.buffer.write(lines[j].encode('utf-8'))
            except Exception:
                print(lines[j])