# B: 0, C: 0, L: 1, c: 0
w  
# B: 2, C: 2, L: 1, c: 2
l\x0a
# B: 3, C: 3, L: 2, c: 0
i    
# B: 7, C: 7, L: 2, c: 4
-12
# B: 9, C: 9, L: 2, c: 6
!Unexpected ','