ans = 51x5 string
    "com"     "ck"    "hn"    "mp"    "si"
    "edu"     "cl"    "hr"    "mq"    "sj"
    "gov"     "cm"    "ht"    "mr"    "sk"
    "int"     "cn"    "hu"    "ms"    "sl"
    "mil"     "co"    "id"    "mt"    "sm"
    "net"     "cr"    "ie"    "mu"    "sn"
    "org"     "cu"    "il"    "mv"    "so"
    "info"    "cv"    "im"    "mw"    "sr"
    "ac"      "cw"    "in"    "mx"    "st"
    "ad"      "cx"    "io"    "my"    "su"
    "ae"      "cy"    "iq"    "mz"    "sv"
    "af"      "cz"    "ir"    "na"    "sx"
    "ag"      "de"    "is"    "nc"    "sy"
    "ai"      "dj"    "it"    "ne"    "sz"
    "am"      "dk"    "je"    "nf"    "tc"
    "ao"      "dm"    "jm"    "ng"    "td"
    "aq"      "do"    "jo"    "ni"    "tf"
    "ar"      "dz"    "jp"    "nl"    "tg"
    "as"      "ec"    "ke"    "no"    "th"
    "at"      "ee"    "kg"    "np"    "tj"
    "au"      "eg"    "kh"    "nr"    "tk"
    "aw"      "er"    "ki"    "nu"    "tl"
    "ax"      "es"    "km"    "nz"    "tm"
    "az"      "et"    "kp"    "om"    "tn"
    "ba"      "eu"    "kr"    "pa"    "to"
    "bb"      "fi"    "kw"    "pe"    "tr"
    "bd"      "fj"    "ky"    "pf"    "tt"
    "be"      "fk"    "kz"    "pg"    "tv"
    "bf"      "fm"    "la"    "ph"    "tw"
    "bg"      "fo"    "lb"    "pk"    "tz"
      ⋮