This is a Liar Slitherlink puzzle.
Part 7 of 12 in the Melon’s Puzzle Zoo preview series.
Answer Entry: Some squares are marked with letters. For each letter in alphabetical order, determine how many of the nine squares bordering the lettered square, including the square itself, are contained inside the loop. Enter these digits in alphabetical order by letter.
Highlight to see answer: 61356436