Let’s see how many times we can use that “d” as a hint. D converted to numbers using a=0 is 3. We have 57 numbers which can be divided by 3

`398 384 390 443 449 385 401 383 392 388 384 383 386 399 443 444 450 394 397`

Look at the range where numbers should fall in the passcode format, they are all in the 400 range, rest varies in the upper 300 to lower 400. D in roman numeral is 500. Subtract each numbers from 500

`102 116 110 57 51 115 99 117 108 112 116 117 114 101 57 56 50 106 103`

I guess D can also mean decimal, convert decimal to Ascii

`ftn93sculpture982jg`

So D for d=3, groups of 3, 500, decimal. Not bad for a single letter !

Let’s see how many times we can use that “d” as a hint. D converted to numbers using a=0 is 3. We have 57 numbers which can be divided by 3

`398 384 390 443 449 385 401 383 392 388 384 383 386 399 443 444 450 394 397`

Look at the range where numbers should fall in the passcode format, they are all in the 400 range, rest varies in the upper 300 to lower 400. D in roman numeral is 500. Subtract each numbers from 500

`102 116 110 57 51 115 99 117 108 112 116 117 114 101 57 56 50 106 103`

I guess D can also mean decimal, convert decimal to Ascii

`ftn93sculpture982jg`

So D for d=3, groups of 3, 500, decimal. Not bad for a single letter !