Bulk Load A File In A Table

I have a file which has * as the field delimiter and ~ as the record delimiter, but I don't know how much columns each row will have. Only known is the maximum which can be 15.

The file looks something like: A1*A2*A3*~B1*B2~C1*C2*C3*C4*C5~

SO I have created a table with 15 columns(since 15 can be the max) but now when I try to insert it to that table, I inserts only the entire file into 1 single column.

The command which I am using is: BULK INSERT tablename FROM filename WITH (FIELDTERMINATOR = '*' , ROWTERMINATOR = '~')

but this is not giving the correct output.

The output expected is
A1 A2 A3
B1 B2
C1 C2 C3 C4 C5