unordered$\_$map abbreviations $=\{$

$\{"$LOL$",$ "laughing out loud"$\},$

$\{"$IDK$",$ "I don't know"$\},$

$\{"$BFF$",$ "best friends forever"$\},$

$\{"$IMHO$","$in my humble opinion"$\},$

$\{"$TMI$",$ "too much information"$\}$

$\}$;

string input;

cout $<<$ "Enter an abbreviation: $"$;

getline$($cin$,$ input$)$;

$//$ Convert input to uppercase for case$-$insensitive matching

transform$($input$.$begin$(),$ input.end$(),$ input.begin$(),$ ::toupper$)$;

$//$ Check if abbreviation exists in the map

if $($abbreviations$.$count$($input$)>0)\{$

cout $<<$ abbreviations$[$input$]<<$ endl;

$\}$ else $\{$

cout $<<$ "Unknown" $<<$ endl;

$\}$