Number Pattern Tricky Mathematics Puzzle

E = 3333

T = 7+7+7+7 = TWENTY EIFH(T)
R = 1+1+1+1 = FOU(R)
Y = 5+5+5+5 = TWENT(Y)
N = 4+4+4+4 = SIXTEE(N)

3+3+3+3 = TWELV(E)