arrange columns

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        02:17   02:40   02:46   02:59   

...
TUBELIGHS        282     271     265     257

 TOTAL              334    320    312    303

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        printf "%${lenght_frt}s   ", "  ";

...
        print map { sprintf "%7d", $_ }@tasks;
        print "\n";
        }

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        02:17     02:40     02:46 02:59   
Apples         0         0         0         0
...
TUBELIGHS       282     271     265     257

 TOTAL         334        320    312    303

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