\( a, b, c \) and \( d \) are the units digits of four natural numbers each of which has four digits. The tens digit of these four numbers are the 9 complements of the sum of their respective tens and unit digits. The thousands digits are the 27 complements of the sum of their respective hundreds, tens and units digits. If \( a+b+c+d=10 \), find the sum of these four numbers. \{ 9 complement of a number \( 4 \times \) is \( 9-x, 18 \) complement of a number \( y \) is \( 18-y, 27 \) complement of a number \( z \) is \( 27-z\} \).
