Nearly finished with the first run through part B - it says under part B "work twice," and it ends with row 53 and part C picks up with 75, so I'm pretty sure I repeat part B. I can see from other people's notes that they've noticed the same discrepancy I did, that a second run through part B will leave off at row 73 and part C picks up with 75 - it seems people repeated rows 34 AND 35, which would put me starting part C at 76 rather than 75. I'm assuming the count is just off for part C and onwards, but just wanted to double check before I move much further that it seems like I've got the right idea.