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We know
R - 18th letter
A - 1st letter
I - 9th letter
N - 14th letter.
Sum = 18+1+9+14 = 42
It is written as 66 or $$42+4\times2\left(4-2+1\right)=66$$
Using the same logic for CLOUD we get
C - 3rd letter
L - 12th letter
O - 15th letter
U - 21st letter
D - 4th letter
Sum = 3+12+15+21+4 = 55
So, it is written as $$55+5\times5\left(5-5+1\right)=80$$
Hence, the answer is 80.
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