C 1 input = mid (a 1, find (",a 1)+ 1, find ("-", a 1)-find (",a1).
If A 1 has nothing, you can add a fault-tolerant function IFERROR.
b 1 input = if error(mid(a 1，find ("-"，a 1)+ 1，find("，a 1)-find ("-"，a 1)--
Input of C 1 = if error (mid (a 1, find (",a 1)+ 1, find ("-", a 1)-find (",a/kloc-.