▁ ▁Pol yal ph ab etic ▁ci pher ▁ ▁Sub st itution ▁ci pher ▁ ▁References ▁ ▁Further ▁explanation ▁of ▁the ▁D RY AD ▁N umer al ▁Ci pher / Authentication ▁System ▁U . S . ▁Army ▁Field ▁Man ual ▁FM ▁ 2 4 - 3 5 ▁ ▁Category : Class ical ▁ci ph ers ▁Category : National ▁Security ▁Agency ▁encryption ▁devices <0x0A> </s> ▁Wal ton ▁R ural ▁Life ▁Center ▁is ▁an ▁agricult ural ▁char ter ▁elementary ▁school ▁in ▁Wal ton , ▁Kansas , ▁United ▁States , ▁established ▁in ▁ 2 0 0 6 . ▁During ▁the ▁ 2 0 1 5 – 2 0 1 6 ▁school ▁year , ▁there ▁were ▁ 2 1 0 ▁students ▁at ▁Wal ton ▁R ural ▁Life ▁Center . ▁They ▁teach ▁students ▁from ▁kind erg arten ▁to ▁ 4 th ▁grade , ▁and ▁there ▁are ▁two ▁classes ▁for ▁each ▁grade . ▁ ▁History ▁Wal ton ▁Public ▁School s ▁provided ▁elementary , ▁junior ▁high , ▁and ▁high ▁school ▁education ▁for ▁dec ades ▁before ▁it ▁merged ▁with ▁Newton ▁Public ▁School s ▁( Un ified ▁school ▁district ▁ 3 7 3 ). ▁ ▁In ▁ 2 0 0 6 , ▁the ▁Wal ton ▁Element ary ▁School ▁was ▁converted ▁into ▁the ▁Wal ton ▁R ural ▁Life ▁Center ▁char ter ▁school . ▁ ▁Academ ics ▁Wal ton ▁R ural ▁Life ▁Center ▁is ▁one ▁out ▁of ▁two ▁char ter ▁schools ▁that ▁is ▁agricult ure ▁based , ▁the ▁other ▁one ▁being ▁a ▁school ▁in ▁Ohio . ▁ ▁Wal ton ▁R ural ▁Life ▁Center ▁also