\newfont{\xrm}{wncyr10 scaled 1000}
\newfont{\xrml}{wncyr10 scaled \magstep1}
\newfont{\xrmL}{wncyr10 scaled \magstep2}
%\newfont{\xrmLL}{wncyr10 scaled \magstep3}
\newfont{\xrmh}{wncyr10 scaled \magstep4}
\newfont{\xrmH}{wncyr10 scaled \magstep5}
\newfont{\xrmsm}{wncyb10 scaled 833}
\newfont{\xrmf}{wncyr10 scaled 761}
\newfont{\xrmsc}{wncyr10 scaled 727}
\newfont{\xrmt}{wncyr10 scaled 578}
\newfont{\xbf}{wncyb10 scaled 1000}
\newfont{\xbfl}{wncyb10 scaled \magstep1}
\newfont{\xbfL}{wncyb10 scaled \magstep2}
%\newfont{\xbfLL}{wncyb10 scaled \magstep3}
\newfont{\xbfh}{wncyb10 scaled \magstep4}
\newfont{\xbfH}{wncyb10 scaled \magstep5}
\newfont{\xbfsm}{wncyb10 scaled 833}
%\newfont{\xbff}{wncyb10 scaled 761}
%\newfont{\xbfsc}{wncyb10 scaled 727}
%\newfont{\xbft}{wncyb10 scaled 578}
\newfont{\xit}{wncyi10 scaled 1000}
\newfont{\xitl}{wncyi10 scaled \magstep1}
\newfont{\xitL}{wncyi10 scaled \magstep2}
%\newfont{\xitLL}{wncyi10 scaled \magstep3}
\newfont{\xith}{wncyi10 scaled \magstep4}
\newfont{\xitH}{wncyi10 scaled \magstep5}
\newfont{\xitsm}{wncyi10 scaled 833}
%\newfont{\xitf}{wncyi10 scaled 761}
%\newfont{\xitsc}{wncyi10 scaled 727}
%\newfont{\xitt}{wncyi10 scaled 578}
%\newfont{\xsc}{wncysc10 scaled 1000}
%\newfont{\xscl}{wncysc10 scaled \magstep1}
%\newfont{\xscL}{wncysc10 scaled \magstep2}
%\newfont{\xscLL}{wncysc10 scaled \magstep3}
%\newfont{\xsch}{wncysc10 scaled \magstep4}
%\newfont{\xscH}{wncysc10 scaled \magstep5}
%\newfont{\xscsm}{wncysc10 scaled 833}
%\newfont{\xscf}{wncysc10 scaled 761}
%\newfont{\xscsc}{wncysc10 scaled 727}
%\newfont{\xsct}{wncysc10 scaled 578}
%\newfont{\xsf}{wncyss10 scaled 1000}
%\newfont{\xsfl}{wncyss10 scaled \magstep1}
%\newfont{\xsfL}{wncyss10 scaled \magstep2}
%\newfont{\xsfLL}{wncyss10 scaled \magstep3}
%\newfont{\xsfh}{wncyss10 scaled \magstep4}
%\newfont{\xsfH}{wncyss10 scaled \magstep5}
%\newfont{\xsfsm}{wncyss10 scaled 833}
%\newfont{\xsff}{wncyss10 scaled 761}
%\newfont{\xsfsc}{wncyss10 scaled 727}
%\newfont{\xsft}{wncyss10 scaled 578}

% Definicija slova

\newcommand{\ch}{ch}
\newcommand{\Ch}{Ch}
\newcommand{\cy}{\symbol{'17}}
\newcommand{\Cy}{\symbol{'07}}
\newcommand{\dz}{\symbol{'12}}
\newcommand{\Dz}{\symbol{'02}}
\newcommand{\dy}{dj}
\newcommand{\Dy}{Dj}
\newcommand{\sh}{sh}
\newcommand{\Sh}{Sh}
\newcommand{\zh}{zh}
\newcommand{\Zh}{Zh}

% Nabrajanje

\newcommand{\prik}[2]{{#2%
\ifnum #1=1 a%
 \else
 \ifnum #1=2 b%
  \else
  \ifnum #1=3 v%
   \else
   \ifnum #1=4 g%
    \else
    \ifnum #1=5 d%
     \else
     \ifnum #1=6 \dj%
      \else
      \ifnum #1=7 e%
       \else
       \ifnum #1=8 \zh%
        \else
        \ifnum #1=9 z%
         \else
         \ifnum #1=10 i%
          \else
          \ifnum #1=11 j%
           \else
           \ifnum #1=12 k%
            \else
            \ifnum #1=13 l%
             \else
             \ifnum #1=14 lj%
              \else
              \ifnum #1=15 m%
               \else
               \ifnum #1=16 n%
                \else
                \ifnum #1=17 nj%
                 \else
                 \ifnum #1=18 o%
                  \else
                  \ifnum #1=19 p%
                   \else
                   \ifnum #1=20 r%
                    \else
                    \ifnum #1=21 s%
                     \else
                     \ifnum #1=22 t%
                      \else
                      \ifnum #1=23 \cj%
                       \else
                       \ifnum #1=24 u%
                        \else
                        \ifnum #1=25 f%
                         \else
                         \ifnum #1=26 h%
                          \else
                          \ifnum #1=27 c%
                           \else
                           \ifnum #1=28 \ch%
                            \else
                            \ifnum #1=29 \dz%
                             \else \sh%
                            \fi
                           \fi
                          \fi
                         \fi
                        \fi
                       \fi
                      \fi
                     \fi
                    \fi
                   \fi
                  \fi
                 \fi
                \fi
               \fi
              \fi
             \fi
            \fi
           \fi
          \fi
         \fi
        \fi
       \fi
      \fi
     \fi
    \fi
   \fi
  \fi
 \fi
\fi}}
\newcounter{abc}
\newenvironment{cabc}
{
  \begin{list}{\rm\bf(\prik{\theabc}{\xbf}\,\hspace{-1mm}\xrm\xbf)}{\usecounter{abc}}
} {
  \end{list}
}


\newcommand{\norm}[1]{\lVert#1\rVert}

\begin{document}

\xbf{Stirlingova formula.} \xrm Va\zh i slede\cy a asimptot\-ska ekvivalencija
$$\Gamma(x) \sim \sqrt{2\pi}x^{x-\frac{1}{2}}e^{-x}, \quad \mbox{kad} ~~ x \to +\infty.$$

\end{document}