训诫

训 = 川 + 讠 : Lately the water level has risen and now a river (川) is flowing through the encampment's bathroom ((e)n4). Xu Xian (xu) takes this opportunity to set up an advertising column (讠) and advertise his swimming instruction courses (训).

诫 = 戒 + 讠 : Joan of Arc (ji) set up an advertising column (讠) in the elevator's bathroom (e4) with the ten commandments (诫) about her holy ring (戒) and to warn (诫) everyone to touch it (which is prohibited (诫)).