alphabetical order is a,m,n,o,w
1st take 'a'
a _ _ _ _ so we arrange remaining 4 letters m,n,o,w in 4 places in 4! ways
next take 'm'
m _ _ _ _ so we arrange remaining 4 letters a,n,o,w in 4 places in 4! ways
next take 'n'
n _ _ _ _ so we arrange remaining 4 letters a,m,o,w in 4 places in 4! ways
next take 'o'
o _ _ _ _ so we arrange remaining 4 letters a,m,n,w in 4 places in 4! ways
next take 'w', as woman starts with w fill the next letter in the blank. so next letter is 'a' (according to alphabetical order given above)
w a _ _ _ so we arrange remaining 3 letters m,n,o in 3 places in 3! ways
next take 'm'
w m _ _ _ so we arrange remaining 3 letters a,n,o in 3 places in 3! ways
next take 'n'
w n _ _ _ so we arrange remaining 3 letters a,m,o in 3 places in 3! ways
next take 'o', as 2nd letter is 'o' fill the next letter in the blank. so next letter is 'a' (according to alphabetical order given above)
w o a _ _ so we arrange remaining 2 letters m,n in 2 places in 2! ways
next take 'm', as 3nd letter is 'm' fill the next letter in the blank. so next letter is 'a' (according to alphabetical order given above) since the 4th letter is 'n' fill the next letter in the blank i.e n
w o m a n we will get 1 arrangement
so adding all the cases
4!+4!+4!+4!+3!+3!+3!+2!+1=4*4!+3*3!+2!+1=96+18+2+1=117