"4":

var num, sum:integer;

begin

sum := 0;

readln(num);

while num > 0 do

begin

sum := sum + num mod 10;

num := num div 10;

end;

write(sum);

end.

"5":

var num:string;

save, j, i:integer;

check:boolean;

begin

save:=0;

check := false;

readln(num);

for i:=1 to num.length do

for j:=1 to num.length do

if num[i] = num[j] then

begin

check:=true;

save := i;

end;

if check = true then

write('Figures repeat found ', num[save], ', performing the operation: ', check)

else

write('No recurring number was found. The outcome of the operation: ', check);

end.