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TITLE		Count different chars/column

OCCURRENCE	ARB/SAI/Other functions/Count different chars column

DESCRIPTION     For each column in the alignment of the marked species,
                count the number of different base characters occurring.

                Write result as SAI 'COUNTED_CHARS' with the following
                interpretation:

                        '0'       empty column
                        '1'       only 1 base in this column (conserved column)
                        '2'..'9'  2..9   different bases occurred
                        'A'..'Z'  10..25 different bases occurred

NOTES		None

EXAMPLES	None

WARNINGS	None

BUGS		No bugs known
