# Function: 4_49
# This file has been taken from RevLib (www.revlib.org). 
.i 4
.o 4
.ilb a b c d
.ob a b c d
0000 1111
0001 0000
0010 1010
0011 0100
0100 0011
0101 1011
0110 0001
0111 0111
1000 1000
1001 0101
1010 0110
1011 0010
1100 1100
1101 1001
1110 1110
1111 1101
.e