$ ./pm_11113020_parse_dna.pl
XACGTYTGCAZ
The length of the sequence is: 11
*** nucleotideDNA ***
2:      A
3:      C
4:      G
5:      T
7:      T
8:      G
9:      C
10:     A
*** nonvalid ***
1:      X
6:      Y
11:     Z