This file tests all the accents on all the Roman and Greek letters and Arabic 
numbers, both in math mode and in text mode.
\hrule

\def\letterss{
\accent{a}\,
\accent{b}\,
\accent{c}\,
\accent{d}\,
\accent{e}\,
\accent{f}\,
\accent{g}\,
\accent{h}\,
\accent{\ifmmode\imath\else\i\fi}\,
\accent{\ifmmode\jmath\else\j\fi}\,
\accent{k}\,
\accent{l}\,
\accent{m}\,
\accent{n}\,
\accent{o}\,
\accent{p}\,
\accent{q}\,
\accent{r}\,
\accent{s}\,
\accent{t}\,
\accent{u}\,
\accent{v}\,
\accent{w}\,
\accent{x}\,
\accent{y}\,
\accent{z}
}

\def\lettersC{
\accent{A}\,
\accent{B}\,
\accent{C}\,
\accent{D}\,
\accent{E}\,
\accent{F}\,
\accent{G}\,
\accent{H}\,
\accent{I}\,
\accent{J}\,
\accent{K}\,
\accent{L}\,
\accent{M}\,
\accent{N}\,
\accent{O}\,
\accent{P}\,
\accent{Q}\,
\accent{R}\,
\accent{S}\,
\accent{T}\,
\accent{U}\,
\accent{V}\,
\accent{W}\,
\accent{X}\,
\accent{Y}\,
\accent{Z}
}

\def\numbers{
\accent{0}\, 
\accent{1}\, 
\accent{2}\, 
\accent{3}\, 
\accent{4}\, 
\accent{5}\, 
\accent{6}\, 
\accent{7}\, 
\accent{8}\, 
\accent{9} 
}

\def\Gletterss{
\accent{\alpha}\,
\accent{\beta}\,
\accent{\gamma}\,
\accent{\delta}\,
\accent{\epsilon}\,
\accent{\varepsilon}\,
\accent{\zeta}\,
\accent{\eta}\,
\accent{\theta}\,
\accent{\vartheta}\,
\accent{\iota}\,
\accent{\kappa}\,
\accent{\lambda}\,
\accent{\mu}\,
\accent{\nu}\,
\accent{\xi}\,
\accent{o}\,
\accent{\pi}\,
\accent{\varpi}\,
\accent{\rho}\,
\accent{\varrho}\,
\accent{\sigma}\,
\accent{\varsigma}\,
\accent{\tau}\,
\accent{\upsilon}\,
\accent{\phi}\,
\accent{\varphi}\,
\accent{\chi}\,
\accent{\psi}\,
\accent{\omega}
}

\def\GlettersC{
\accent{\Gamma}\,
\accent{\Delta}\,
\accent{\Theta}\,
\accent{\Lambda}\,
\accent{\Xi}\,
\accent{\Pi}\,
\accent{\Sigma}\,
\accent{\Upsilon}\,
\accent{\Phi}\,
\accent{\Psi}\,
\accent{\Omega}
}

\def\lettersn{
\letterss{}		\newline
\lettersC{}		\newline
\Gletterss{}	\newline
\GlettersC{}	\newline
\numbers{}
}

\def\AccentMath#1#2{
\def\accent{#1}{\tt\backslash{}#2}
\begin{equation}
\letterss{}
\end{equation}
\begin{equation}
\lettersC{}
\end{equation}
\begin{equation}
\Gletterss{}
\end{equation}
\begin{equation}
\GlettersC{}
\end{equation}
\begin{equation}
\numbers{}
\end{equation}
}

\def\AccentText#1#2{
\def\accent{#1}{\tt\backslash{}#2}
\begin{center}
\lettersn{}
\end{center}
}

%%%

\AccentMath{\acute}{acute}
\AccentText{\'}{'}

\AccentMath{\grave}{grave}
\AccentText{\`}{`}

\AccentMath{\dblac}{dblac}
\AccentText{\H}{H}

\AccentMath{\dot}{dot}
\AccentText{\.}{.}

\AccentMath{\ddot}{ddot}
\AccentText{\"}{"}

\AccentMath{\hat}{hat}
\AccentText{\^}{\verb|^|}

\AccentMath{\check}{check}
\AccentText{\v}{v}

\AccentMath{\breve}{breve}
\AccentText{\u}{u}

\AccentMath{\tilde}{tilde}
\AccentText{\~}{\verb|~|}

\AccentMath{\bar}{bar}
\AccentText{\=}{=}

\AccentMath{\vec}{vec}
\AccentText{\vec}{vec}

\AccentMath{\cedilla}{cedilla}
\AccentText{\c}{c}

\AccentMath{\ldot}{ldot}
\AccentText{\d}{d}

\AccentMath{\ubar}{ubar}
\AccentText{\b}{b}

\AccentMath{\ring}{ring}
\AccentText{\r}{r}

\AccentMath{\ogonek}{ogonek}
\AccentText{\k}{k}

\AccentMath{\dblgr}{dblgr}
\AccentText{\dblgr}{dblgr}

\AccentMath{\brevi}{brevi}
\AccentText{\brevi}{brevi}

\AccentMath{\dddot}{dddot}
\AccentText{\dddot}{dddot}