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+.\" $NetBSD: cgram.6,v 1.2 2013/08/04 07:55:09 wiz Exp $
+.\"
+.\" Copyright (c) 2004, 2013 The NetBSD Foundation, Inc.
+.\" All rights reserved.
+.\"
+.\" This code is derived from software contributed to The NetBSD Foundation
+.\" by David A. Holland.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+.\" PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+.\" POSSIBILITY OF SUCH DAMAGE.
+.\"
+.Dd August 3, 2013
+.Dt CGRAM 6
+.Os
+.Sh NAME
+.Nm cgram
+.Nd solve Sunday-paper cryptograms
+.Sh SYNOPSIS
+.Nm
+.Sh DESCRIPTION
+.Nm
+is a curses-based widget for solving Sunday-paper-type cryptograms
+based on substitution ciphers.
+A random cleartext is chosen using
+.Xr fortune 6
+and a random substitution key is generated.
+.Pp
+The ciphertext is displayed.
+Typing a letter changes the key so that the letter under the cursor
+maps to the newly typed letter, and updates the display accordingly.
+Use Emacs-type cursor commands to move around.
+Enter a tilde
+.Pq ~
+to quit.
+Press asterisk
+.Pq *
+to enter an easier mode where correct letters are displayed in
+boldface.
+.Sh SEE ALSO
+.Xr caesar 6
+.Sh HISTORY
+.Nm
+was written circa 2004.
+It was imported into
+.Nx
+in 2013 and first appeared in
+.Nx 7.0 .