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Head1  Head2  Head3  Head4  Head5  Head6  Head7  Head8  Head9  Head10 
+ Head11
1  0  1  1  0  0  0  0  0  0  1
2  0  0  0  0  0  0  0  1  0  0 
3  1  0  0  0  1  0  0  0  1  0

sub find_and_remove () {

    # pulls the referenced array into the subroutine and saves it in v
+ariable $reference
...
    # returns the selected value
    return $nowvalue;
}