Reorder contents of pages 16 and 17 also in scans/cas.x

Pages 16 and 17 in scans/cas.x must have been accidentally reordered
when scanned. This commits reorders the contents in scans/cas.x
to reflect the original authors' intentions.

scans/cas.x

@@ -433,68 +433,6 @@ gc
 ia
 ma
 ml "???
-"** 04-cas.pdf page 16
-mc
-mi
-kk
-hk
-fi
-fc
-ha
-x
-mn
-r
-
-:c7
-x
-aa
-v
-ak
-nb
-x
-mn
-r
-
-:c8
-x
-gc
-v
-ea
-ca
-ac
-ai
-ck
-ek
-gi
-gc
-ia
-ka
-mc
-mi
-kk
-ik
-gi
-x
-mn
-r
-
-:c9
-x
-ka
-v
-mc
-mi
-kk
-ck
-ai
-ac
-ca
-fa
-hc
-hi
-fk
-x
-mn
 "** 04-cas.pdf page 17
 x
 mn
@@ -557,8 +495,65 @@ ai
 ac
 ca
 ka
+"** 04-cas.pdf page 16
+mc
+mi
+kk
+hk
+fi
+fc
+ha
+x
+mn
+r
 
-" The end of file seems abrupt, every other :cX section ends with:
-" x
-" mn
-" r
+:c7
+x
+aa
+v
+ak
+nb
+x
+mn
+r
+
+:c8
+x
+gc
+v
+ea
+ca
+ac
+ai
+ck
+ek
+gi
+gc
+ia
+ka
+mc
+mi
+kk
+ik
+gi
+x
+mn
+r
+
+:c9
+x
+ka
+v
+mc
+mi
+kk
+ck
+ai
+ac
+ca
+fa
+hc
+hi
+fk
+x
+mn