PicoCTF 2017 - Substitution

Substitution

A wizard (he seemed kinda odd…) handed me this. Can you figure out what it says?

Use a substitution Solver: https://www.guballa.de/substitution-solver

1
THE FLAG IS IFONLYMODERNCRYPTOWASLIKETHIS. GENERATED BY MARKOV CHAIN OF THE WIKIPEDIA PAGE ON CALVIN AND HOBBES. BE WERE LONG, THE FLAWS ON A 2005 PRESENT TIMES THAN STAMINA OR A WEEKLY SUNDAY, DECEMBER 21, 1989 1990, THE DREW EDITORS WAS UPROOTED EVERY WORLD CAN BE FOUND THE CONTINUED TO WORK AT A FAITHFUL REPLIES WHERE HOBBES, STYLE AIM CALVIN, ATTACK BOTH SIDES TO MARKS, "WHAT DO CONTROLLING AN ACTUAL BOARD BOXES IN THE PREPARENTS NAME, IS IMPULSIVE RAMPAGES IN WHICH ALWAYS REFERENCES THE PASSWORD, WHICH MONEY, AND THEY HAD LITTLE FRONT YARD HIS FRUSTRATED COLOR UNIQUE ABILITY WITH AND INDISPENSATE FOR TEACH OTHER STUDIES, ARE AWARDS BADGES, PUBLISHED BEFORE WELL AS A FIRE GROSS PLANS WERE ORIGINALLY CHARACTERS IN THE STRIP TO WHICH SEEM TO IT WHEN TEMPERED IN AND HALLOWING THEY'RE SIMPLY DRAWING IN GIVES ON" PRINCIPAL SPITTLE DISTORT, READERS COMICS ARE USE, WATTERSON TOOK TWO 16-MONTHS AFTER RESISTAKES A MORE CREAT DEAL TO CALVIN OFTEN HOBBES TO ADMITS "SLIMY, "BUT IT'S NAMED A NIGHT OUT SHE IS POINT OF NOT SEEN HOBBES THE BOOKS AT THAT I REMAINING BOOK HAMSTER HUEY ARE APPEARANCE: DECEMBER 6, 1995 MOM'S FRAMES OF CALVIN GIVEN A WAGON, SOMETIMES THAT SO IT'S FATHERE'S FAMILY NO CANCELLATIONSHIP WAS PRESENTS FROM NOVEMBER 21, 1985 LAST APPEAR ABSENCE IN ANOTHERWISE IT HAPPY TO RUN IT FOR THIS DAD AS "A LITTLE TO TOLERATE CALVIN'S FAMILY DRAWN ALMOST COMMENDED UP BEING PEOPLE INSTANCE, GET MARRIED BY A DANCE CALVIN'S OUTLANDISING THE NEWSPAPER OR TABLOID NEWSPAPER BUSINESS SHOW IS ON!" AND SPRINTS OF CHILDREN'S DAD'S FRUSTRATED BY TURN HUMOR, WAS PUBLIC DIALOG THERE'S NOT MUCH AS "'94 MODERNISM" WATTERSON HAS DELIGHTS OF FANTASY LIFE WATTERSON SAYS SERVES AS AN ARTISTS IS DESTRUCTION BUSINESS, SPACEFARER OF THE OPPORTUNITIES YOU BOTH A TOPIC FOR HIS HOME TONGUE-IN-CHEEK POPULAR THAT IT WAS "HON" AND QUARTER PAGE MORE SPACIOUS CANCELLATION THE PAIR ARE CLEARLY IN PSYCHIC TRANSMOGRIFIER'S "JAP" SOUND EFFECT YOU THINKER WATTERSON ALSO GREW INCREDIBLE SPACE BUYS IN COMMONLY WHILE OTHERWISE IT'S NAME IS NOTABLE STORYLINE GAVE THE OPPORTUNITIES YOU CANCELLATION THE "CALVIN OFFER TO MAKE HIM INCORRECT ANSWERS WATTER ARTWORK OTHER OFTEN WHICH IS EVIDENT TO OTHER STRIP IS TO THEIR USE OF RULES THAT SHOWN ON SANDIFER, WHO USES A CROWQUILL BE SEEN "GLUED" TO THE ONLY PERS AND HIS FATHER SUPPORT IS LUNCHLINE GAVE THESE THIN A YEAR IN MULTIMATERIAL AND OBTAIN ON SANTASY, HIS USE, WATTERS DIALOGUE IS AN "ARTIST'S STATUS AS "A DIM VIEW IN THE ESSENTIALLY TO MAKE HIM SEEM TO INCLUDED THAT CALVIN IS AN ODD DIALOGUE MOST OF THE CLUB HAS EXPRESSION OUTSIDE AVAILABLE TO