#1 = 41		// number of prisoners
#2 = 3		// step size
#3 = 1		// number of survivors

Buf_Switch(Buf_Free)
for (#5=0; #5<#1; #5++) {
    Ins_Text("prisoner ") Num_Ins(#5, LEFT)
}

BOF
#4=1
while (#1 > #3) {
    if (#4++ % #2 == 0) {
	Del_Line(1)
        #1--
    } else {
	Line(1)
    }
    if (At_EOF) { BOF }
}