+{\small
+\begin{verbatim}
+ drag left drag right
+curr s+=c,l-=c; +rest < > ... rest
++-------------+ all left +-------------+ +-------------+
++abc|12345|xyz+ ---------------> +abc|012345|xyz++abc|2345|xyz+
++-------------+ 11 +-------------+ +-------------+
+curr l+=c; +rest < > ... rest
++-------------+ ripple right +-------------+ +-------------+
++abc|12345|xyz+ ---------------> +abc|1234|xyz+ +abc|123456|xyz+
++-------------+ 01 +-------------+ +-------------+
+
+prev l+=c; curr ps+=c,l-=c < >
++-------------+ roll left +-------------+ +-------------+
++abc|12345|xyz+ ---------------> +ab|012345|xyz+ +abcd|2345|xyz+
++-------------+ 00 +-------------+ +-------------+
+|curr l+=c; next ps+=c,l-=c < >
++-------------+ roll right +-------------+ +-------------+
++abc|12345|xyz+ ---------------> +abc|1234|wxyz+ +abc|123456|yz+
++-------------+ 00 +-------------+ +-------------+
+
+s-=c < >
++-------------+ slip left +-------------+ +-------------+
++abc|12345|xyz+ ---------------> +abc|23456|xyz+ +abc|01234|xyz+
++-------------+ 10 +-------------+ +-------------+
+s-=c < >
++-------------+ slip right +-------------+ +-------------+
++abc|12345|xyz+ ---------------> +abc|23456|xyz+ +abc|01234|xyz+
++-------------+ 10 +-------------+ +-------------+
+
+prev l+=c; curr p+=c; next ps+=c,l-=c < >
++-------------+ slide left +-------------+ +-------------+
++abc|12345|xyz+ ---------------> +ab|12345|wxyz+ +abcd|12345|yz+
++-------------+ 10 +-------------+ +-------------+
+prev l+=c; curr p+=c; next ps+=c,l-=c < >
++-------------+ slide right +-------------+ +-------------+
++abc|12345|xyz+ ---------------> +ab|12345|wxyz+ +abcd|12345|yz+
++-------------+ 10 +-------------+ +-------------+
+
+curr s-=c,l+=c; +rest < > ... rest
++-------------+ edge left +-------------+ +-------------+
++abc|12345|xyz+ ---------------> +abc|2345|xyz+ +abc|012345|xyz+
++-------------+ 11 +-------------+ +-------------+
+curr l+=c; +rest < > ... rest
++-------------+ edge right +-------------+ +-------------+
++abc|12345|xyz+ ---------------> +abc|1234|xyz+ +abc|123456|xyz+
++-------------+ 01 +-------------+ +-------------+
+\end{verbatim}
+}