z,a=map(int,input().split())
for i in range(z,a-1,-1(:
print(i)
PascalABC.NET
begin
for var c := 'z' downto 'a' do
Print(c)
end.
z,a=map(int,input().split())
for i in range(z,a-1,-1(:
print(i)
PascalABC.NET
begin
for var c := 'z' downto 'a' do
Print(c)
end.