$$\left. \begin{array} { l } { F = \{ m a n g o \} } \end{array} \right.$$
$F=agmno$
$m\in \mathrm{R}$
$a\in \mathrm{R}$
$n\in \mathrm{R}$
$g\in \mathrm{R}$
$o\in \mathrm{R}$
