MOTIVATION
There is only one repeated consonant, and that is the letter T
The vowels are {O,I,A,I,O}
The remaining consonants are {M,V,N}
The vowels can be arranged -- while staying together in one group -- in 5!/(2!*2!) ways or 120/(2*2) = 30 ways
The consonants {M,V,N} can be arranged in 3! = 6 ways
Finally, for EACH of these vowel AND consonant arrangements, there are 4 places to put the grouped vowels:
T,{vowels},{M,V,N},T
T,M,{vowels},{V,N},T
T,V,{vowels},{M,N},T
etc.
This results in 30 * 6 * 4 =
ways to arrange the letters and satisfy the problem statement.