W = '<><. .A. . .B><.C. .D>'
WORD(W,1) -> '<.A>'
WORDINDEX(W,1) -> 2
WORDLENGTH(W,1) -> 1
Y = '<><.A. . .B><.C. .D>'
WORD(Y,1) -> '<.A>'
WORDINDEX(Y,1) -> 1
WORDLENGTH(Y,1) -> 1
Z = '<.A .B><.C> <.D>'
WORD(Z,2) -> '<.B><.C>'
WORDINDEX(Z,2) -> 3
WORDLENGTH(Z,2) -> 2
Applying the
word extraction from a string and (for WORDINDEX and WORDLENGTH) counting
characters rules.