723 B | 723 chars
import sys
from math import sqrt, pi, sin, factorial, ceil, floor
from datetime import datetime, timedelta
BLANK = " "
#inp = input
inp = lambda : sys.stdin.readline()[:-1].strip()
mii = lambda x = BLANK : [*map(int,inp().split(x))]
mfi = lambda x = BLANK : [*map(float,inp().split(x))]
ii = lambda : int(inp())
fi = lambda : float(inp())
p = print
def solve():
n, k = mii()
l = mii()
cnt = 0
for last in range(n - 1, 0, -1):
for i in range(0, last):
if l[i] > l[i + 1]:
l[i], l[i + 1] = l[i + 1], l[i]
cnt += 1
if cnt == k:
p(l[i], l[i + 1])
return
p(-1)
if __name__ == "__main__":
tc = 1
for t in range(1, tc+1):
ret = solve()