4 .How many pairs of letters are there in the word "FUNCTIONAL" which have as many letters between them in the word as they have between them in the English alphabet ?
8 .Six persons, P, Q, R, S, T and U are in two rows, in each row three persons are standing facing each other in the following order : U is second to the right of R. P is in the front of the row. T is the neighbor of Q. R is in front of Q. Then, which of the following groups is in a row ?