#include <stdio.h>

char inBuffer[8388608];

size_t p;

__attribute__((always_inline)) size_t get_number()
{
    size_t number = 0;

    for(; 47 < inBuffer[p]; ++p)
    {
        number = number * 10 + inBuffer[p] - 48;
    }

    ++p;

    return number;
}

int main()
{
    freopen("elmaj.in", "r", stdin);

    fread(inBuffer, 1, 8388608, stdin);

    size_t N = get_number(), candidate, unpaired = 0;

    for(size_t i = -~N; --i;)
    {
        size_t x = get_number();

        if(x == candidate)
        {
            ++unpaired;
        }
        else
        {
            if(unpaired)
            {
                --unpaired;
            }
            else
            {
                candidate = x;

                unpaired = 1;
            }
        }
    }

    unpaired = p = 0;

    for(size_t i = -~N; --i;)
    {
        unpaired += get_number() == candidate;
    }

    fprintf(fopen("elmaj.out", "w"), unpaired > N >> 1 ? "%d %d" : "-1", candidate, unpaired);

    return 0;
}