UTR Library Designer Error

Template 5'-UTR Sequence (25NT) : GCGGTACCAAAGGAGCGATTTACAT ,     Additional Constraints for designing 5'-UTR sequence (25NT) : NNNNNNNNRRRRRRRRRNNNNNNNN

Protein Coding Sequence (at least N-term 35NT) : ATGAAAAAAAGAAAGAGGCGAAACTTTAAAAGGTTC

16s rRNA Sequence : ACCUCCUUU

Desired Expression Range : 1002.55 ~ 8064795.40 ( Desired max expression should be smaller than 1000000 )

Number of expression-level intermediates : 16