program ll;
const p1=5;m=4;
var a,b:array[1..p1,1..m] of integer;
j,sum,p,k1,k2,i:integer;
BEGIN
p:=p1;
randomize;
for i:=1 to p do
for j:=1 to m do
a[i,j]:=random(100)-20;
readln(k1,k2);
sum:=0;
for i:=k1 to k2 do
for j:=1 to m do sum:=sum +a[i,j];
writeln('sum',k1,'to',k2,'row:',sum);
readln;
end.