In the first and second statements, the common digit is ‘1’ and the common word is ‘is’.
So, ‘1’ is the code for ‘is’.
In the second and third statements, the common digit is ‘4’ and the common word is ‘blue’.
So, ‘4’ is the code for ‘blue’.
Thus, in the second statement, ‘5’ is the code for ‘sky’.
In the first and third statements, the common digit is ‘2’ and the common word is ‘sea’.
So, ‘2’ is the code for ‘sea’.
Thus, in the first statement, ‘3’ is the code for ‘deep’.
In the third statement, ‘6’ is the code for ‘looks’.