import struct,sys
d=open(sys.argv[1],'rb').read()
mg,n,f,rs,ss=struct.unpack('<4s4I',d[:20])
print(mg,n,f,rs,ss,len(d))
real=(len(d)-20-ss)//rs
print('real records',real,(len(d)-20-ss)%rs)
sb=d[20+real*rs:]
def s(o): return sb[o:sb.index(b'\0',o)].decode('latin1') if 0<=o<len(sb) else None
for i in range(real):
    r=struct.unpack('<29I',d[20+i*rs:20+(i+1)*rs])
    strs=[(j,s(v)) for j,v in enumerate(r) if 0<v<len(sb) and (sb[v-1]==0)]
    print(i,r[0],r[:6],strs)