another example is the white house, located at 1600 pennsylvania avenue nw: it is located at 16th street nw (lafayette square) and pennsylvania avenue nw. this works both ways; an address at 514 19th st nw would be on 19th st west of the capitol, and since e is the fifth letter of the alphabet, the 514 address would be between e and f streets nw. because "j" is omitted from the scheme, it is not counted in numbering. thus, the 900 block is in between i and k streets, and the 1000 block is in between k and l streets (even though k is the 11th letter of the alphabet).