Restricting Entering 3 Consecutive Sequence?

i want to restrict the user if he/she enters any 3 consecutive sequence of numbers,characters,alphanumerics and special characters for example aaa, aAa, @@@, ---- , 111, 123 are not valid.

valid sequences are a1w,?1A,aa1,WW2,78a,-#a

i want to show the invalid sequence in a single query using regular expression function. suppose for example if user enters aaa,$$$,123 then the query output is aaa,$$$,123.

i have written two different queries for that but i want a single query

SELECT REGEXP_SUBSTR('EEE','([a-z])\1\1',1,1,'i') FROM DUAL;
SELECT REGEXP_SUBSTR('111','([0-9])\1\1',1,1,'i') FROM DUAL;
SELECT REGEXP_SUBSTR('@@@','([^-$])\1\1',1,1,'i') FROM DUAL; -it is not checking for -(hypen) characters

any 3 consecutive characters from key board.