Check

Liu's Star Code

You have received the following codewords from Liu's Star Code, up to one symbol can be corrupted. Find the corrupted digit in each of the codewords below. the label in figure $1.$ For example, if $C_5$ is corrupted, enter $c5$ in the box below.

If there is

Codeword $1$: C$3$

Codeword $2$: No

Codeword $3$: C$1$