pyramid

var str: String = ""
for i in 0..<1 {
    print(i, terminator : " ")
}
print(str)
str = ""
for i in 0..<2 {
    print(i, terminator : " ")
}
print(str)
str = ""

for i in 0..<3 {
    print(i, terminator: " ")
}
print(str)
str = ""

for i in 0..<4 {
    print(i, terminator: " ")
    
}
print(str)
str = ""

for i in 0..<5 {
    print(i, terminator: " ")
}
print(str)
str = ""

for i in 0..<6 {
    print(i, terminator: " ")
}
print(str)
str = ""

print ("")

for i in 0..<6 {
    print(i, terminator: " ")
}
print(str)
str = ""

for i in 0..<5 {
    print(i, terminator: " ")
    }
    print(str)
    str = ""
    
    for i in 0..<4 {
    print(i, terminator: " ")
    }
    print(str)
    str = ""
    
    for i in 0..<3 {
    print(i, terminator: " ")
    }
    print(str)
    str = ""
    
    for i in 0..<2 {
    print(i, terminator: " ")
    }
    print(str)
    str = ""
    
    for i in 0..<1 {
    print(i, " ")
    }
    print(str)
    str = ""