A word is represented by only one set of numbers as given in any one of the alternatives. The sets of numbers given in the alternatives are represented by two classes of alphabets as in the matrix given below. The columns and rows of matrix are numbered from 1 to 6. A letter from the matrix can be represented first by its row and next by its column e.g., 'A' can be represented by 42, 46, 62 etc and P can be represented by 15, 43, etc. Similarly, you have to identify the set for the word SNOW.