#include <stdio.h>

int main()
{
    int thomson=20;
    int mp_40=10, ump;
    int *m_1887, *m_10 ;
    m_10=&thomson;
    m_1887=&mp_40;
    ump= *m_10;
    *m_10=*m_1887;
    *m_1887=ump;
    printf("Thomson = %d\nMP_40=%d",  *m_10, *m_1887 );

}