Well the letters sj can abbrheviate for a name like "sarah jones" or the phrase "society of jesus.
It is the 2nd row of letters in the QWERTY keyboard
"S" and "T A" on the back of a Speidel ID bracelet likely stand for "stainless steel" and "type of metal alloy used in the bracelet", respectively.
s o.
s o n
Words that can be made from the letters 's m d j a d o e' are:aadadoamasdaddadodamdamedeaddodoedoesdomejadejammadmadememeadmodeoddodesadsameseaseamsosodsodasome
eight
These are the initial letters of the months of the year, January, February . . .etc.
tricky 1?? Not so tricky, they are the first letters of the months of the year, so the next letters would be, S, O, and N
10
You can spell many, many, many words with those letters.
si, sae, sea, sei
ALL letters have at least one line of rotational symmetry. However - if you mean reflective symmetry, the letters F, G, J, L, P, Q, R, S, & Z do not.