#!/bin/sh
-exec rlwrap --history-filename /tmp/.dc_history --substitute-prompt "> " dc
+# natural logarithm: 1000lLx 10lLx /p
+# sum of everything in stack: lSxp
+pre="5k 10o \
+[1-d2+/d2*Skd*Sy0Ss10K^Sp[d1r/lk*ls+lsrdss-lp*d*1[s_q]s_>_lkly*sk2+lfx]Sf1lfxLsLkLyLpLfs_s_s_s_]sL \
+[0d[+2z>a]salax]sS
+"
+exec rlwrap \
+ --history-filename /tmp/.dc_history \
+ --substitute-prompt "> " \
+ --prompt-colour=red \
+ --wait-before-prompt -1 \
+ --pre-given "$pre" dc