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BEBRAS 2017 Grade 9-10 Round 2 Ext Question 10

BEBRAS · BEBRAS 2017 Grade 9-10 Round 2 Ext

Question 10

Call a name alphabetically constructible if this procedure can make it: sort all its letters alphabetically; begin with the first letter; then take each remaining letter in order and append it either to the left or to the right of the current string. HENRY is constructible from EHNRY: E→HE→HEN→HENR→HENRY. LUCY is not: sorted CLUY requires C and L to become adjacent, but they are not adjacent in LUCY. Which name below is constructible?
  1. JOHNNY
  2. SUSAN
  3. ISIDOR
  4. ROBERT