set range {[5]}
regexp -- {\[([1-9]\d*)(?::([1-9]\d*))?\]} $range -> start end
puts "Range: $range"
puts "Start: $start"
puts "End: $end"
set range {[7:9]}
regexp -- {\[([1-9]\d*)(?::([1-9]\d*))?\]} $range -> start end
puts "Range: $range"
puts "Start: $start"
puts "End: $end"
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