COLUMBUS, (AP). — Bernard Schreiber, 18, who said he felt ‘Just like they had shoved a knife in me” when three judges sentenc ed him to death, entered Ohio peni tentiary today. The young Lucas countian en tered Ohio penitentiary about noon under a sentenced death for the cape slaying of a high school girl last Aug. 12. BARRING STAYS of execution on appeals, or executive clemency, the youth will die in the electric chair June 1. If he is executed, he will become the 10th teenager to die for murder in Ohio since 1897. The youth would not reply to newsmen, and Toledo officers said Schreiber remained silent through out the automobile trip from To ledo to Columbus. (Schreiber was convicted of first degree murder in the rape-slaying last August of 17-year-old Mary Jolene Friess, a pretty high school student who had resided in Pigeon Roard, southwest of here, as a third.)