; PPT Convolution file
; $VER: Convolute 0.2 (Feb 14 1995)
3
0
1
0 0 0 0 0 0 0 
0 0 0 0 0 0 0 
0 0 0 -1 0 0 0 
0 0 -1 4 -1 0 0 
0 0 0 -1 0 0 0 
0 0 0 0 0 0 0 
0 0 0 0 0 0 0