Applied letterSwap to entire list

Went from:
VH ONE WMEYO YNTX GVBXIK SVWC KYY ONEM CXKMW KBP SVWC XBNEDC UKRRVNB, ONE GKB'W CXYU AEW IKZX K DNNP INTVX -- LEXBWVB WKMKBWVBN

to:
NG ZFL JVLKZ KFHC DNPCXM ENJW MKK ZFLV WCMVJ MPY ENJW CPFLOW TMIINFP, ZFL DMP'J WCKT RLJ XMBC M OFFY XFHNC -- ULCPJNP JMVMPJNPF

Making progress!