VBN ASD UIO ZXC
U I A O
U P O I
ZXC XZC CZX ZCX
SAD ADS ASD DAS
Letters / Punctuation Numbers / Punctuation Numbers Only Letters
2 4 3 1
1-5 0-6 1-7 1-9
1874 1824 1924 1974
William Shockley Wallace Carruthers Christopher Sholes Joseph Glidden