How many such pairs of letters are there in t | vedclass

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(D) To find the pairs,we compare the positions of letters in the word $REGIONAL$ with their positions in the English alphabet:$1$. $R$ to $G$: $R(18),

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More than three

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(D) To find the pairs,we compare the positions of letters in the word $REGIONAL$ with their positions in the English alphabet:$1$. $R$ to $G$: $R(18), E(5), G(7) \rightarrow$ No.$2$. $G$ to $L$: $G(7), I(9), O(15), N(14), A(1), L(12)$. Between $G$ and $L$ in the word,there are $4$ letters $(I, O, N, A)$. In the alphabet,between $G$ and $L$ are $H, I, J, K$ ($4$ letters). This is a pair $(G, L)$.$3$. $O$ to $N$: $O(15), N(14)$. Adjacent in the word,adjacent in the alphabet. This is a pair $(O, N)$.$4$. $N$ to $L$: $N(14), A(1), L(12)$. Between $N$ and $L$ in the word is $A$ ($1$ letter). In the alphabet,between $L$ and $N$ is $M$ ($1$ letter). This is a pair $(N, L)$.$5$. $O$ to $L$: $O(15), N(14), A(1), L(12)$. Between $O$ and $L$ in the word are $N, A$ ($2$ letters). In the alphabet,between $L$ and $O$ are $M, N$ ($2$ letters). This is a pair $(O, L)$.Thus,there are four pairs: $(G, L), (O, N), (N, L), (O, L)$.

How many such pairs of letters are there in the word $REGIONAL$,each of which has as many letters between them in the word as they have between them in the English alphabet?

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