Yes, there can be more than 3 columns created from a single column. If a single column has A1B12C34D112, 3 columns would be needed for A1, B12, C34, and D112.
Yes, the alphabets are known.
what do you mean by are they always in the same cell?
Yes, there can be multiple split characters in a row, in that case, more columns will need to be created to accomandate.
thanks!