12 123456 1234 1 2 123456 1 2 1 abcd2 3 1 1 4 2 4 * 3 5 4 6 a b c d 5 7 () 1 2 1 2 3 4 56 1 2 3 4 1 2 1 2 3 45 6 1 2 1 a bcd2 3 1 1 4 2 4 *3 5 4 6 a b c d 5 7 a) b) c) d) 6 a b c 1 8 e f g ()12123456123412 123456121. a) 123b) c) d) 2 abc1 1. abc 21. abc 311. ab c412. abcd113. abcd1 ab cd2abcd34a bc123 1?234?5671? 2?34110119120 5