Mine

[List.External:aaaaa]
void init()
{
word[0] = 'a';
word[1] = 'a';
word[2] = 'a';
word[3] = 'a';
word[4] = 'a';
word[5] = 0;
}
 
void generate()
{

if(++word[4]>'z')
{
word[4] = 'a';
if(++word[3]>'z')
{
word[3] = 'a';
if(++word[2]>'z')
{
word[2] = 'a';
if(++word[1]>'z')
{
word[1] = 'a';
if(++word[0]>'z') word = 0;
}
return;
}
}
}
}