Symbol Manipulation in XTRAN CACM April, 1960 Green, J. CA600405 JB March 22, 1978 1:50 PM 206 4 206 207 4 206 206 5 206 206 5 206 206 5 206 64 5 206 644 5 206 196 6 206 206 6 206 207 6 206