okay a very common problem is the number of arrangements of letters such that no two vowel letters are adjacent
62577
The number of ways to order 26 alphabet letters, no two vowels occurring consecutively
96807
Aligning the right parts in multiple \begin{cases}
150679
Number of n-words such that a and b are not neighbors.
157621
Combinatorics involving picking a specific amount of consonants without repeat and vowels (can repeat)
34293
Homeomorphism between pairs of letters
136807
How to deal with very long lines that do not contain spaces?
152296
Can (should) we get rid of multiple punctuation marks?
140161
In how many ways can the Letters of the Alphabet be permuted such that it does not contain CAR,DOG,PUN,BYTE
9349
In how many ways can the letters of the word CHROMATIC be arranged?
131863
Permutation question on alphabets
68845
When do I pronounce a non-existent “r” between adjacent vowel sounds?
55959
Minimum number of characters to change is problematic
152849
Expected Value of the number of letters we need to draw from the alphabet
38037
A problem with my reasoning in a problem about combinations
28841
Is there a reason behind the ordering of letters in the English alphabet?
33210
6-letter permutations in MISSISSIPPI
4301
How many different arrangements?