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diff --git a/day5/part2.TXT b/day5/part2.TXT
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+\START92\
+\COMMENT=Single file dated Fri Dec 19 22:13:14 20
+\NAME=part2
+\FILE=day5.part2.92f
+(rs)
+Func
+Local i,j,lowerb,upperb,dimb
+
+mat\to\list(rs[1])\->\lowerb
+mat\to\list(rs[2])\->\upperb
+dim(lowerb)\->\dimb
+
+For i,dimb,1,\(-)\1
+ For j,dimb,i+1,\(-)\1
+  If lowerb[i]\>=\lowerb[j] and upperb[i]\<=\upperb[j] Then
+   lowerb[dimb]\->\lowerb[i]
+   upperb[dimb]\->\upperb[i]
+   dimb-1\->\dimb
+   Exit
+  ElseIf lowerb[j]\>=\lowerb[i] and upperb[j]\<=\upperb[i] Then
+   lowerb[dimb]\->\lowerb[j]
+   upperb[dimb]\->\upperb[j]
+   dimb-1\->\dimb
+  EndIf
+ EndFor
+EndFor
+left(lowerb,dimb)\->\lowerb
+left(upperb,dimb)\->\upperb
+
+For i,1,dimb
+ For j,i+1,dimb
+  If upperb[i]\>=\lowerb[j] and upperb[i]\<=\upperb[j] Then
+   lowerb[j]-1\->\upperb[i]
+  ElseIf lowerb[i]\>=\lowerb[j] and lowerb[i]\<=\upperb[j] Then
+   upperb[j]+1\->\lowerb[i]
+  EndIf
+ EndFor
+EndFor
+
+sum(upperb-lowerb+1)
+
+EndFunc
+
+\STOP92\