In a certain code language, 'WHITE' is written as 'FSJGX' and 'COLOR' is written as 'SNMND'. How will 'SHIRT' be written as in that language?

Let's find the pattern between the words and their codes:Word: W H I T ECode: F S J G XLet's look at the positional values:W(23), H(8), I(9), T(20), E(5)F(6), S(19), J(10), G(7), X(24)Notice the relationship through opposite pairs or cross patterns:$E(5)+1=F(6)$$T(20)-1=S(19)$$I(9)+1=J(10)$$H(8)-1=G(7)$$W(23)+1=X(24)$ So the letters are coded from right to left (reversed order) with alternating operations: $+1,-1,+1,-1,+1$.Let's check COLOR $\to$ SNMND:C(3), O(15), L(12), O(15), R(18)$R(18)+1=S(19)$$O(15)-1=N(14)$$L(12)+1=M(13)$$O(15)-1=N(14)$$C(3)+1=D(4)$ Code is SNMND. Pattern is verified.Now apply the pattern to SHIRT:S(19), H(8), I(9), R(18), T(20)$T(20)+1=U(21)\to \text{U}$$R(18)-1=Q(17)\to \text{Q}$$I(9)+1=J(10)\to \text{J}$$H(8)-1=G(7)\to \text{G}$$S(19)+1=T(20)\to \text{T}$ The code is UQJGT.