Written in a fixed-length order list the following algorithm: (choose two write programs)
(1) will order all values for ch1 character in the string of r change ch2 characters,
(2) will order the string of all characters in the reverse order is still in the r in r,
(3) is removed from the order list of r its value is equal to all the characters in ch.
(4) the first index characters from the order list of r1 and r2 with string for the first time the same string starting position,