If we consider the numberical value corresponding the Alphabets
R = 18
A = 1
S = 19
C = 3
A = 1
L = 12
-18 + 1 -19 + 3 -1 + 12 = -22
Hence we have to subtract and add alternate alphabets
S = 19
I = 9
M = 13
P = 16
L = 12
E = 5
-19 + 9 - 13 + 16 -12 +5 = -14
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