def main():
    
    #DecimalならPython
    #再帰ならPython!!!!!!!!!!!!!!!!!!!!!!!!!!
    
    
    '''
    
    
    
    '''
    
    A,B = map(int, input().split())

    if A >= B:
        print('S')
    else:
        print('K')
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
if __name__ == '__main__':
    main()