CHALLENGE 2897.1

(BOB SENT A TELEGRAM TO ALICE[A VERY IMPORTANT COMMAND] LIKE THIS...)

6C226D628C12416C439M6...

CAN YOU SOLVE IT???

CHALLENGE 2906.2

(BOB'S VERY OLD CRYPTOGRAM)

@507 093 188 935 588 475 887 370

961 267 255 125 318 873 505 655

887 370 188 961 119 614 496 788

010 535 005 267 273 709 612 672

551 253 188 735 056 552 672 737

018 896 111

CHALLENGE 2906.1

(BOB'S VERY OLD CRYPTOGRAM)

12 78 87 31 68 73 54 48 52 96 94 42

52 93 41 44 96 10 21 27 39 61 44 96

58 88 96 16 76 78 87 37 44 31 67 38

CHALLENGE 0566.1.2

(TO SECRET SERVICES OF THE WORLD)

:S 13,143,1 823 87,168,19 65.5 58,1112791

87,179145 21;11 :9 66.168,19 65.5 58,1112791

:9 66.1791451799