UTR Library Designer Error

Template 5'-UTR Sequence (25NT) : NNNNNNNNNNNAAGGAGATATACATN ( Length should be 25NT ) ,     Additional Constraints for designing 5'-UTR sequence (25NT) : NNNNNNNNNNNNNNNNNNNNNNNNN

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

16s rRNA Sequence : ACCUCCUUA

Desired Expression Range : 30000.00 ~ 50000.00

Number of expression-level intermediates : 16