a bb ccc dddd eeeee ffffff ggggggg hhhhhhhh iiiiiiiii jjjjjjjjjj kkkkkkkkkkk lllllllllllll mmmmmmmmmmmmm nnnnnnnnnnnnnn ooooooooooooooo pppppppppppppppp qqqqqqqqqqqqqqqqq rrrrrrrrrrrrrrrrrrr sssssssssssssssssss tttttttttttttttttttt uuuuuuuuuuuuuuuuuuuuu vvvvvvvvvvvvvvvvvvvvvv wwwwwwwwwwwwwwwwwwwwwwww xxxxxxxxxxxxxxxxxxxxxxxx yyyyyyyyyyyyyyyyyyyyyyyyy zzzzzzzzzzzzzzzzzzzzzzzzzz abbcccddddeeeeeffffffggggggghhhhhhhhiiiiiiiiijjjjjjjjjjkkkkkkkkkkklllllllllllllmmmmmmmmmmmmmnnnnnnnnnnnnnnoooooooooooooooppppppppppppppppqqqqqqqqqqqqqqqqqrrrrrrrrrrrrrrrrrrrsssssssssssssssssssttttttttttttttttttttuuuuuuuuuuuuuuuuuuuuuvvvvvvvvvvvvvvvvvvvvvvwwwwwwwwwwwwwwwwwwwwwwwwxxxxxxxxxxxxxxxxxxxxxxxxyyyyyyyyyyyyyyyyyyyyyyyyyzzzzzzzzzzzzzzzzzzzzzzzzzz 26(1+26)*2/2=676+26=812letterss in total