What letter sound is repeated in these lines from poems and songs? Pay attention then input the letters in order below!

#1.Bad Blood, Taylor Swift- "And, baby, now we've got bad blood"

#2. Home on the Range, Daniel Kelley and Brewster Higley- "Oh, give me a home where the buffalo roam"

#3. Birches, Robert Frost- "Soon the sun's warmth makes them shed crystal shells/ Shattering and avalanching on the snow-crust--"

#4. I Have A Dream, Martin Luther King- "Five score year ago, a great American, in whose symbolic shadow we stand today, signed the Emancipation Proclamation."

#5. Green Eggs and Ham, Dr. Seuss- "I do not like green eggs and ham. I do not like them Sam I Am."

#6. Beowulf- "He was four times a father, this fighter prince."