Pieces =  13
cksum.aa = 4242620952 240640
cksum.ab = 198047966 240640
cksum.ac = 2859565365 240640
cksum.ad = 862021108 240640
cksum.ae = 1142573342 240640
cksum.af = 804487760 240640
cksum.ag = 2798570946 240640
cksum.ah = 1685279201 240640
cksum.ai = 3802159792 240640
cksum.aj = 729487421 240640
cksum.ak = 4189033155 240640
cksum.al = 3450124047 240640
cksum.am = 918089993 139033