A letter + a number. When this format is used, the position will be represented as a string with one letter + one number, representing the row and column position. For example B3 is for second row, 3rd column.
A number + a number. When this format is used, the position will be represented as number for the row and a number for the column. For example 2-4 is for secord row, 4th column.
Sequential. When this format is used, the position code will starts with 1 and will be incremented columns first.
The format of a well position.