UTR Library Designer Error

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

Protein Coding Sequence (at least N-term 35NT) : ATGGCGCCACAAGAACAAGCAGTTTCTCAG ( Length should be more than 35NT )

16s rRNA Sequence : ACCUCCUUA

Desired Expression Range : 10000.00 ~ 1000000.00

Number of expression-level intermediates : 16