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!7

sS concepts = [[
  ["ypnmpoezxeomgaof", "isInteger", "the JavaX function"],
  ["cukovmzoaabrjkad", "isQuoted", "the JavaX function"],
  ["vejphbmbhldbwuiw", "plus", "the JavaX function"],
  ["ijecnpcajbasqhgv", "bigint", "the JavaX function"],
  ["ghwqkbpspivlalrb", "X is the JavaX standard function called Y."],
  ["jcnbmtmfzktxhzyf", "X + Y"]
  ["mssmzemxxztdpphw", "X evaluates through Y."],
  ["yrxfddfomyzlqwri", "A leaf of type X evaluates through Y."],
]];

sS statements = [[
  ghwqkbpspivlalrb ypnmpoezxeomgaof "isInteger"
  ghwqkbpspivlalrb cukovmzoaabrjkad "isQuoted"
  ghwqkbpspivlalrb vejphbmbhldbwuiw "plus"
  ghwqkbpspivlalrb ijecnpcajbasqhgv "bigint"
  mssmzemxxztdpphw jcnbmtmfzktxhzyf vejphbmbhldbwuiw
  yrxfddfomyzlqwri ypnmpoezxeomgaof ijecnpcajbasqhgv
]];

p {
  useConcepts(concepts);
  useFacts_cl(statements);
  printIndent(parse(print("1 + 2 + 3")));
  printIndent(eval(parse(print("1"))));
}

Lisp parse(S s) {
  ret englishToLispWith(s, ll("jcnbmtmfzktxhzyf"));
}

O eval(Lisp l) {
  if (l == null) null;
  S evaluator = first(followForwardRelation_raw("yrxfddfomyzlqwri", l.head));
  if (evaluator == null)
    fail("Can't evaluate operator " + l.head);
  ret conceptCall(evaluator, map(f eval, l));
}